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Merlin Build Guide

Merlin portrait

Merlin

Attacker class icon
Avalon
SSR Fire Attacker DPS

Merlin is a one-target nuke machine: her auto deals 780% and applies [Mark] (+20% ULT damage on marked targets), her ULT hits 1080%: 1200% enhanced after a Supporter ULT: and her passive adds a free 120% fire hit on every ULT crit. She is the classic "hold her ULT for the Supporter window" attacker, and with crit built she chains bonus hits endlessly.

Skill Priority

Skill level recommendations:

1
Auto Skill: Magic Swordsmanship: Molten Core Burst
Level 14
Cooldown: 5.0s Deals 780% Attack as fire damage to the targeted enemy unit And applies [Mark] When Merlin uses an ULT to attack a target with [Mark], damage increases by 20%
2
Ultimate: Magic Swordsmanship: King's Blade
Level 14
Energy Cost: 6 Cooldown: 1.0s Deals 1080% Attack as fire damage to the targeted enemy unit After a [Supporter] uses an ULT, can use 1 [Enhanced ULT] within 5 seconds [Enhanced ULT]: Deals 1200% Attack as fire damage to the targeted enemy unit, with a 30% multiplier increase when only one enemy is present
3
Passive: Rune Oscillation
Level 14
When an ULT crits, deals an additional 120% Attack as fire damage
4
Normal Attack: Blazing Slash
Level 14
Cooldown: 2.0s Deals 120% Attack as fire damage to the targeted enemy unit

Recommended Memory Cards

These are the best memory cards for Merlin:

Monster in the Dense Forest memory card
Monster in the Dense Forest ★ Exclusive
Must Have
Attack increases by 40%, when there is only one enemy on the field, ULT damage increases by 40%
Note: Exclusive card: +40% ATK and +40% ULT damage against lone targets. Boss-room multiplier on her already-huge ULT.
Stats: HP 5,040 / ATK 780 / DEF 474
Frozen Heart memory card
Frozen Heart
Highly Recommended
Critical Rate increased by 34% Pursue Damage dealt by the wearer increases Critical Damage by 68%
Stats: HP 5,040 / ATK 780 / DEF 474
King of Lust memory card
King of Lust
Highly Recommended
Critical hit rate increased by 40%, attack power increased by 40%. Each time the wearer's attack hits an enemy, they accumulate 1 stack of [Battle Spirit]. Once [Battle Spirit] reaches 10 stacks, all [Battle Spirit] will be consumed, and the [Penetrating] effect will be gained, increasing critical hit damage dealt by 50% for 5 seconds. [Battle Spirit] will not accumulate while the [Penetrating] effect is active.
Stats: HP 5,040 / ATK 780 / DEF 474

Alternative Memory Cards

Good alternative options if you don't have the recommended cards:

Shared Bath Time memory card
Shared Bath Time
Attack power increases by 40%, and all damage increases by 40% when casting an ultimate skill. After the equipped character casts an ultimate skill, gain 1 stack of [Charge]. After dealing damage to any target, consume [Charge] to apply 1 stack of [Final Flame]. [Final Flame]: Deals 15% Blaze</color> damage every 2 seconds, up to 5 stacks, lasting 10 seconds.
Stats: HP 5,040 / ATK 780 / DEF 474
Weird eyes full of desire memory card
Weird eyes full of desire
Increases critical hit rate by 34%. When other friendly units cast a Ultimate Skill, the wearer's damage increases by 24% for 5 seconds, and can be stacked up to 3 times.
Stats: HP 5,040 / ATK 780 / DEF 474
Black-Faced Fool memory card
Black-Faced Fool
Attack increases by 40%, when attacking targets affected by Damage Over Time, damage increases by 40%
Stats: HP 5,040 / ATK 780 / DEF 474

Runes Priorities

Focus on these rune stats for Merlin:

Primary Stat:
Attack%
Secondary Stat:
Crit Rate

Highly Recommended Stats:

ATK% Crit Rate%

Additional Stats:

Crit DMG% Penetration ATK
Build Note: Multipliers are large, so % damage and crit scale harder than flat ATK: element damage on position 5, crit on position 4.

Recommended Rune Sets:

Hepha.webp rune (4-piece)
4-piece
+
Beth rune (2-piece)
2-piece
Hepha 4-piece + Beth 2-piece
2-piece (Hepha): Blaze damage increased by 10%
4-piece (Hepha): When dealing Blaze attribute Ultimate Skill damage, Critical Rate is increased by 12% and Attack Power is increased by 16%
2-piece (Beth): Critical Rate increases by 6%

Alternative Builds:

Beth rune (4-piece)
4-piece
+
Hepha.webp rune (2-piece)
2-piece
Beth 4-piece + Hepha 2-piece
2-piece (Beth): Critical Rate increases by 6%
4-piece (Beth): When HP is above 80%, Critical Damage increases by 24%
2-piece (Hepha): Blaze damage increased by 10%

Main Stats by Position

Recommended main stats for each rune position for Merlin:

Position 1: Fixed Main Stat

HP (Flat Value)

Always HP - no other options

Position 2: Fixed Main Stat

Attack (Flat Value)

Always Attack - no other options

Position 3: Fixed Main Stat

Defense (Flat Value)

Always Defense - no other options

Position 4: Variable Main Stats

Available Options:
Healing Effectiveness (%) Critical Rate (%) Critical Damage (%) Attack Penetration (%) Attack (%) HP (%) Defense (%)

Pick the recommended stat pair that matches the rune build below.

Position 5: Variable Main Stats

Available Options:
Wind Attribute Damage (%) Fire Attribute Damage (%) Ice Attribute Damage (%) Holy Attribute Damage (%) Chaos Attribute Damage (%) Attack (%) HP (%) Defense (%)

Position 6: Variable Main Stats

Available Options:
Attack (%) HP (%) Defense (%)

Awakening Priority

A2 is the biggest early jump, then A4. A3/A5 raise skill level caps (+2 each) and are dupe-gated: take A6 last for the team-wide bonus.

A1 Good

Critical rate increases by 15%

A2 Very Good

After a [Disruptor] uses an ULT, can use one [Enhanced ULT] within 5 seconds And when using an [Enhanced ULT], critical damage increases by 20%

A3 Mid

[Skill] and [Normal Attack] level and level cap +4

A4 Good

ULT damage increases by 35%

A5 Mid

[ULT] and [Passive] level and level cap +4

A6 Good

[Enhanced ULT] ignores 20% of the target's elemental resistance

Team Synergy

Good Teammates:

SharinBorsTamamo-no-MaeNephthysMorgan Le FayMedusa

A Supporter ULT unlocks her 1200% Enhanced ULT: always cycle them together.