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Legendary Byleth (M)

Analysis by accidentalgreed
Legendary Byleth (M) - The Fódlan Star

5

Obtainable as a 5 only

Hero Stats

Max Avg Total Stats at Lvl 40
166
HP 40
ATK 39
SPD 41
DEF 25
RES 21

Stat Variations

Level 1 Stat Variation
5★
HP ATK SPD DEF RES
Low 17 8 10 2 7
Middle 18 9 11 3 8
High 19 10 12 4 9

Level 40 Stat Variations
5★
HP ATK SPD DEF RES
Low 36 36 38 21 17
Middle 40 39 41 25 21
High 43 43 45 28 24

IV Sets

Key stats worth increasing through nature if possible.
Complementary stats that matter, but not to the point of picking them over key stats for nature increase.
Relatively worthless stat that can safely be decreased through nature.
HPATKSPDDEFRES

Skill Sets

tfw you copied some gnome's homework then suddenly become legendary (Windsweep / General Use)

Build by accidentalgreed
Recommended
Professorial Text A Swift Sparrow 3
Alternate: Life and Death (3 or 4)
Reposition
Alternate: Draw Back
B Windsweep 3
Sublime Heaven C Time's Pulse 3
IVs

+SPD or +ATK / -HP or -DEF or -RES

SSwift Sparrow 2
Alternate: Life and Death 3

Show Explanation/Analysis

Weapon: Professorial Text

Assist: Reposition

Special: Sublime Heaven

Passive A: Swift Sparrow 3 / Life and Death / Other Atk/Spd-boosting skills 

Passive B: Windsweep / Watersweep

Passive C: Time's Pulse

Sacred Seal: Swift Sparrow / Atk/Spd Solo / Life and Death

  • Byleth unapologetically takes many pages out of Young Merric's study notes running an eerily similar tome with Slaying and Null Follow-Up effects. With Windsweep added to Byleth's list of obviously plagiarized academia, he can run a deadly attacking build that simultaneously offsets his exploitable defenses as well. 
    • Thanks to the Null Follow-Up effect of Professorial Text, Byleth negates any follow-up hindrances associated with Windsweep. Thus, Byleth can initiate into many slower physical weapon-wielding enemies with absolutely zero fear of retaliation, allowing him to deal essentially free and massive damage in a short amount of turns.
    • You may also consider run Watersweep to disable the counterattacks of magic and dragon enemies instead, though the number of relevant enemies affected by Windsweep far exceeds that of Watersweep. 
  • Since Windsweep requires Byleth to maintain a Speed advantage over his foe, it naturally follows that this build prefers high-tier Atk/Spd A and Sacred Seal skills. Swift Sparrow is therefore easy to recommend for both slots as it provides a straight Atk/Spd boost simply for absolutely zero drawbacks or conditions other than initiating combat. Life and Death drops Byleth's defenses, but that doesn't really matter on a build that blocks counterattacks anyway, and both its third and fourth tier variants slightly inch ahead of Swift Sparrow's second and third tier versions respectively. Other similar choices are up to your inheritance choices and discretion — Atk/Spd Ideal, for instance, technically provides the highest stat swing. 
  • The combination of Professorial Text's CD-1 and Byleth's base Time's Pulse allows the instant full precharge of Sublime Heaven, allowing Byleth to deal a powerful burst of increased damage at the start of every turn. This is especially important to bypass any form of Special denial, such as Guard and especially Fallen Edelgard's Armored Wall.

Professor Eisner's Super Awesome Totally-Not-Plagiarized Tutoring Program (Support Battery Focus)

Build by accidentalgreed
Recommended
Professorial Text A Life and Death (3 or 4)
Alternate: Atk/Def Ideal 4
Shove B Windsweep 3
Alternate: Lull Atk/Res 3
Sublime Heaven C Joint Drive Spd
Alternate: Distant Guard 3
IVs

+SPD or +ATK / -RES or -HP or -DEF

SDistant Guard 3
Alternate: Drive Atk 2

Show Explanation/Analysis

Weapon: Professorial Text

Assist: Shove / Reposition

Special: Sublime Heaven

Passive A: Life and Death / Atk/Def Ideal / Miscellaneous Atk/Spd skills

Passive B: Windsweep / Lull Atk/Res 

Passive C: Joint Drive Spd / Distant Guard / Joint Drive Atk / Infantry Breath / Other "Within Two Spaces" skills

Sacred Seal: Distant Guard / Drive Atk / Tactics / Other Drive skills

  • Seeing as Professorial Text features the ability to jointly share Null Follow-Up with fellow nearby allies, a build that's geared more towards providing additional support is definitely within Byleth's cards. Though a few skill slots are surrendered towards this goal, Byleth doesn't lose much of his offensive utility at all; he still utilizes Professorial Text and accompanying skills like Windsweep seriously well while balancing his buffing duties. Keep in mind, however, that this form of Null Follow-Up only applies if his teammate's Speed is greater than that of their enemy unit. (Translation: use fast carry allies only.)
  • As usual of support units, Byleth favors supportive C and Sacred Seal slot skills to further enrichen his allies' combat. In particular, skills that provide buffs "within two spaces" are recommended to mesh in addition to the existing "Drive NFU" effect of Professorial Text while providing a less stressful positioning requirement overall. 
    • Joint Drive Skills make for a fine choice as they simultaneously improve a chosen stat between Byleth and his ally. Joint Drive Spd in particular synergizes directly with the Speed domination requirement of Professorial Text's NFU effect.
    • Distant Guard or Close Guard provides a more defensive stat swing.
    • You may also consider running infantry-specific skills such as Infantry Breath or Infantry Rush — though considering the infantry class's existing access to Null Follow-Up (meaning you can run pretty much any other battery unit) and the limited usability of these skills, they have less value on Byleth overall.
  • Shove is a recommended Assist skill that is more specific to this build's playstyle than others. It pushes a chosen ally closer to a desired spot on the map while still abiding by his skills' two-space requirements. Else, other Assists are perfectly fine for your preferences. 
  • The shifting goals of this build mean that while Windsweep + an Atk/Spd A-slot skill is endgame desirable, simply running his good base skills won't affect the main points of the build much on a budget. Hence, Atk/Def Ideal and Lull Atk/Res are listed while serving to improve Byleth's bulk and damage output as a nice bonus.

Officially Certified By The Misoshiro Sukarai Scholarship™ (Non-Sweep Offense)

Build by accidentalgreed
Professorial Text A Fury (3 or 4)
Alternate: Life and Death (3 or 4)
Positional Assist B Desperation 3
Alternate: Special Spiral 3
Sublime Heaven
Alternate: Blazing Wind
C Time's Pulse 3
Alternate: Joint Drive Atk
IVs

+ATK or +SPD / -HP or -DEF or -RES

SLife and Death 3
Alternate: Atk/Spd Solo 3

Show Explanation/Analysis

Weapon: Professorial Text

Assist: Any Assist

Special: Sublime Heaven / Blazing Wind

Passive A: Fury 4 / Life and Death / Swift Sparrow / Other Atk/Spd boosting skills

Passive B: Desperation / Special Spiral

Passive C: Time's Pulse / Joint Drive Atk

Sacred Seal: Life and Death / Swift Sparrow / Atk/Spd Solo

  • This build is recommended more for general gameplay such as Abyssal map clearance — the previous two builds require basically no setup to function and are better built for PVP.  
  • Professorial Text provides a subset of effects which basically opens Byleth's B slot for a couple of colorful options. In addition to some beefy additional stats +5 while in combat:
    • The Null Follow-Up segment of the weapon allows Byleth to basically run Desperation unhindered by skills that stop follow-up attacks, such as Wary Fighter or Twin-Crest Power. 
    • The fact that Professorial Text reduces Byleth's cooldown by -1 permanently means he can alternatively run Special Spiral with a desired AOE Special without requiring a Blade skill.
  • For A-slots, most of the entire Atk/Spd pool is Byleth's oyster:
    • Fury is universally great for both mentioned strategies — the extra bulk and damage suffered after every combat means it's significantly safer to set up Desperation, and the visible Atk/Spd boosts alternatively optimize AOE Special damage (they take Byleth's visible Atk stat minus the enemy's Res for damage calculation. 
    • Life and Death provide larger visible Atk/Spd gains, but at the cost of Byleth's setup as it negatively impacts his defenses as well.
    • In-combat Atk/Spd swing skills such as Swift Sparrow or Atk/Spd Solo are also fair game, but are not as optimal for AOE damage.
  • Time's Pulse is a fantastic default skill that's pretty difficult to replace as this build places significant emphasis on Byleth's offense and Specials. Generally, it precharges Sublime Heaven fully so that Byleth can start off with a bang at the start of any turn, and while it essentially turns useless after the first round of AOE, it makes it easier to charge up the first time around. 
  • If you're concerned about optimal effect usage or simply improving damage, Joint Drive Atk or Joint Drive Spd are there as hybrid support / offense-boosting options. Notably, they just so happen to synergize wonderfully with the similar "within two spaces" Null Follow-Up effect from Byleth.

Strengths

Professorial Text

Our dear, widely-loved-by-all Professor unapologetically takes many pages out of a certain magic garden gnome's study notes with a tome that similarly provides:

  • A Slaying effect, which permanently reduces the general activation timing of any Special Byleth chooses. This especially includes his exclusive Sublime Heavenwhose benefits are detailed below.
  • Increased stats during combat; +5 to all stats in particular makes merging him a mere optional afterthought (especially for people who can't go further than budget) as it improves his already-great statline — thus his combat potency and bulk — all-around. 
  • And lastly and probably most importantly, an easy form of Null Follow-Up, allowing him to directly counteract forced follow-up manipulation effects as well as make fantastic use of the infamous Windsweep + Null Follow-Up weapon combination. Very unique to him, however, is the fact that this NFU effect can essentially be shared with other allies within two spaces; this potentially frees up the B slot of many units who prefer using other skills (such as Special Spiral or Null C-Disrupt) as long as they are fast enough to activate it. 

These effects altogether allow Byleth to stand on his own as a potent and versatile offensive and supportive unit for effectively all forms of content. As you've seen by scrolling past to this point, his skill choices are rather extensive as a result. 

Infantry Skill Access

Byleth makes very efficient and apparent use of his infantry status with his default skills Lull Atk/Res and Time's Pulse, the latter of which is especially important for fully precharging Sublime Heaven. Additionally, though builds involving the following are not listed, he makes rather nice use of alternatives like Special Spiral and Null-C Disrupt if your build calls for them. 

Sublime Heaven

Byleth's unique Special is an improved version of the inheritable Ruptured Sky; not only does it feature slightly better damage values in 25% of Byleth's Attack (a far more reliable metric than the opponent's Attack, and goes up to a whopping 50% against dragons or beasts), but it more importantly offers the ability to cut through any form of damage reduction — something that has become annoyingly prevalent in recent times. Its short cooldown combined with Professorial Text's Slaying effect and Byleth's default C slot, Time's Pulse, also means Byleth pretty much has Sublime Heaven ready to fire every turn à la a certain Golden Deer student.

Weaknesses

Softlocked to Water Season

Being a Legendary Hero has its occasional advantages, but it's a real, stinking shame when a unit so powerful and diverse in the support and offense department like Byleth is basically locked and only optimal in Water seasons. Specifically, using Byleth off-season results in a few caveats:

  • Byleth won't be counted at all when calculating your total Lift gains/losses per Aether Raids Offense and Defense matches. Accordingly, you lose more and gain less on non-Water seasons. 
  • Additionally, Byleth can't benefit from Mythic Blessings from present Mythic Allies, which tends to make him perform worse and fall behind other perfectly blessed units. 
  • Byleth won't be able to slightly boot up your overall Colisseum scoring based on conferred ally blessings in non-Water seasons.  

Sketchy Defenses

Though padded out by the easy spectrum stats effects of Professorial Text, Byleth's lower defensive values leave a lot to be desired. Generally, even medium power hits can damage him quickly and sizeably when Byleth is exposed to straight hits. This prevents him from confidently dipping his toes in carry play — like fellow low defense "tanks" like Brave Claude and Young Innes, he will need to make up for this by focusing on restoring his HP more, stacking Mythic Hero stat blessings, as well as rely on strategically-positioned ally support skills like Distant Guard or Caduceus Staff

Weapon Skills

Weapons SP Rng. Mt.
Wind
Learns by default at 1 ★
Unlocks at 1 ★
Green Tome Users Only
50 2 4
Elwind
Learns by default at 3 ★
Unlocks at 2 ★
Green Tome Users Only
100 2 6
Rexcalibur
Learns by default at 4 ★
Unlocks at 3 ★
Green Tome Users Only
200 2 9
Professorial TextAccelerates Special trigger (cooldown count-1). If unit initiates combat or is within 2 spaces of an ally, grants Atk/Spd/Def/Res+5 during combat, and also, if unit's Spd > foe's Spd during combat, neutralizes effects that guarantee foe's follow-up attacks and effects that prevent unit's follow-up attacks.  Allies within 2 spaces gain: "If unit's Spd > foe's Spd during combat, neutralizes effects that guarantee foe's follow-up attacks and effects that prevent unit's follow-up attacks."
Learns by default at 5 ★
Unlocks at 5 ★
Non-Inheritable skill.
400 2 14
Weapon Evolution
Weapon Upgrades
Weapon Upgrades

Special Skills

Special Skills SP Turns
Dragon GazeBoosts Atk by 30%.
Learns by default at 4 ★
Unlocks at 3 ★
Non-inheritable by Staff-wielding units.
100 4
Draconic AuraBoosts Atk by 30%.
Unlocks at 4 ★
Non-inheritable by Staff-wielding units.
200 3
Sublime HeavenBoosts damage by 25% of unit's Atk. If in combat against a dragon foe or beast foe, boosts damage by 50% instead of 25%. Disables non-Special skills that "reduce damage by X%."
Unlocks at 5 ★
Non-Inheritable skill.
500 2

Passive Skills

Passive Skills SP Slot
Atk/Def Ideal 1At start of combat, if unit's HP = 100% or if【Bonus】is active on unit, grants Atk/Def+3 to unit during combat.  【Bonus】 All effects that last "for 1 turn" or "that turn only." Includes bonuses granted by a skill like Rally or Hone and positive status effects (extra movement or effects like Dominance).
Excludes Flying and Cavalry Units
Unlocks at 2 ★
60
A
Atk/Def Ideal 2At start of combat, if unit's HP = 100% or if【Bonus】is active on unit, grants Atk/Def+4 to unit during combat.  【Bonus】 All effects that last "for 1 turn" or "that turn only." Includes bonuses granted by a skill like Rally or Hone and positive status effects (extra movement or effects like Dominance).
Excludes Flying and Cavalry Units
Unlocks at 3 ★
120
A
Atk/Def Ideal 3At start of combat, if unit's HP = 100% or if【Bonus】is active on unit, grants Atk/Def+5 to unit during combat.  【Bonus】 All effects that last "for 1 turn" or "that turn only." Includes bonuses granted by a skill like Rally or Hone and positive status effects (extra movement or effects like Dominance).
Excludes Flying and Cavalry Units
Unlocks at 4 ★
240
A
Atk/Def Ideal 4At start of combat, if unit's HP = 100% or if【Bonus】is active on unit, grants Atk/Def+7 to unit during combat. At start of combat, if unit's HP = 100% and【Bonus】is active on unit, grants an additional Atk/Def+2 to unit during combat.  【Bonus】 All effects that last "for 1 turn" or "that turn only." Includes bonuses granted by a skill like Rally or Hone and positive status effects (extra movement or effects like Dominance).
Excludes Flying and Cavalry Units
Unlocks at 5 ★
300
A
Lull Atk/Res 1Inflicts Atk/Res-1 on foe and neutralizes foe's bonuses to Atk/Res (from skills like Fortify, Rally, etc.) during combat.
Excludes Armor and Flying units.
Unlocks at 1 ★
60
B
Lull Atk/Res 2Inflicts Atk/Res-2 on foe and neutralizes foe's bonuses to Atk/Res (from skills like Fortify, Rally, etc.) during combat.
Excludes Armor and Flying units.
Unlocks at 2 ★
120
B
Lull Atk/Res 3Inflicts Atk/Res-3 on foe and neutralizes foe's bonuses to Atk/Res (from skills like Fortify, Rally, etc.) during combat.
Excludes Armor and Flying units.
Unlocks at 4 ★
240
B
Time's Pulse 1At the start of every third turn, if Special cooldown count is at its maximum value, grants Special cooldown count-1.
Infantry Units Only
Unlocks at 3 ★
60
C
Time's Pulse 2At the start of every second turn, if Special cooldown count is at its maximum value, grants Special cooldown count-1.
Infantry Units Only
Unlocks at 4 ★
120
C
Time's Pulse 3At start of turn, if Special cooldown count is at its maximum value, grants Special cooldown count-1.
Infantry Units Only
Unlocks at 5 ★
240
C

Other Info

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