Merlin — 7DS: Origin Hero Guide (Kit, Builds & Teams)

Book is Merlin's self-sufficient Ice carry, and the whole kit revolves around Frost Mark. Frost Seed plants a zone that ticks 22% of Attack every 0.5 seconds for 5 seconds and stacks Frost Marks on everything inside; Cold Intellect replaces her Normal Attack with the Glacial Pierce stance for 6 seconds (6% per hit, up to 312%), which Freezes after 15 hits and adds a fresh Frost Mark every 8 hits on a marked target (max 4). Each Frost Mark also feeds her engine: it restores 150 Tag Gauge when hit (3-sec cooldown), so she charges her own Tag Skill just by attacking marked enemies.

The payoff is the Tag Skill, Frost Sweep: it deals 150% and gains +30% damage for every Frost Mark on the target, and when it hits an enemy at max marks it removes one for a flat +300% of Merlin's Attack. The passive Infinite Frost ties it together — whenever a new Frost Mark lands on an unmarked enemy she gains +40% Cold Attack for 15 seconds and +50% damage against marked targets, and allied Normal Attacks can even apply marks for her. The loop is simple: seed marks → ramp Cold Attack → Tag-switch to cash the spike.

Wand is Merlin's Lightning carry, and its engine is the passive Circuit Break. Using a Combined Attack with her Ultimate as the base grants Overload for 25 seconds, which raises all of her Lightning damage by 50% — and while Overload is active, Judgment of Thunder also inflicts Vulnerable (+30% Defense Shatter) on the target. Her Ultimate, Plasma Dome: Overload, hits 406% and, on a Combined Attack, layers +20% All Elemental Attack (up to 5000) for 10 seconds, so the opener both deals damage and turns her whole team's elements up.

Inside the Overload window she runs a cooldown-loop. Electromagnetic Field grants immunity to reactions and ticks 16% every 0.5 seconds, with each hit cutting her Normal-Skill cooldown and adding +10% Normal-Skill damage (max 5). Judgment of Thunder (159%) cast twice within 7 seconds unlocks Divine Judgment (329%, final hit −5 cooldown), and her Normal Attack, Electrostream, shaves a further second off the Normal-Skill cooldown on Lightning-Burst targets. The result is a Lightning carry that, once Overloaded, rarely stops casting.

Staff is Merlin's heaviest single hit, and it is gated behind Fire Burst. The passive Core Ignition is the whole pitch: when a Fire Burst activates, her Special Attack and Normal Skill are both replaced by the Ultimate, which costs no Magic for 10 seconds and deals +100% damage against Fire-Burst targets. That Ultimate, Celestial Collapse, lands 196% up front plus an 8%-per-second Fire DoT for 10 seconds, and bumps Fire Weakness Damage by 10% on the target. The catch in the data: this free Ultimate can only fire once per window, doesn't trigger Combined Attacks, so it's a finisher, not a loop.

Her setup tools soften the target first. Seeking Crimson drops a 12-second tracking zone that strips 1% Fire Resistance per hit (up to 30) and feeds the Burst Gauge, while Illusory Heat plants a Taunt Decoy that lowers enemy Fire Burst Resistance by 20% for 30 seconds and explodes for 100% when it expires. Build the gauge, trigger the Fire Burst, then unload the free Ultimate into a resistance-stripped, weakness-amped target. Outside a Fire team that can reliably reach Burst, most of this value goes dark — build Staff deliberately for Fire compositions.

The pattern matches every hero: odd levels (1, 3, 8) are flat Attack / Defense / Max HP, and the even levels are the skill amplifiers worth chasing. Because she is an SSR with three paths, fund one track to its key amps before touching another rather than spreading Potential Points thin.

Her signature grade-5 weapon is the Gluttonous Soul Grimoire (Book only): using the Normal Skill increases Cold Attack by 26% for 20 seconds — a direct multiplier on her Frost-Mark Cold-Attack ramp. On every path the universal pick is Black Flame Wings (Book, Wand or Staff): activating a Burst grants +28% Attack and +6% Crit Chance for 10 seconds. Breath of Glory (also all three types) is the alternative for longer fights — after a Special Attack, each Normal Attack stacks Attack up to +20.8% over 20 seconds.

1. 1Drake461%Highest listed partner payload; anchors several of her verified 3-hero combos.
2. 2Meliodas449%Premium carry most accounts own; his combo inflicts Opening (−defense) for 20 sec.
3. 3King433%Heavy payload plus +30% team Magic Charging Efficiency for 40 sec.
4. 4Howzer406%Repeated partner across her verified 3-hero combos.
5. 5Elaine402%Appears in the most of her listed 3-hero combos.
6. 6Dreyfus400%Round 400% combo payload.
7. 7Escanor397%Premium Fire carry; his combo grants +30% Max HP for 20 sec — natural with Staff.
8. 8Diane371%Combo grants +30% Defense and +30% Normal-Skill damage for 20 sec.

Verified 3-hero Combined-Attack combos in her data: Drake + Howzer, Drake + Elaine, Daisy + Howzer, Daisy + Elaine, Elaine + Tristan, Elaine + Tioreh, Elaine + Escanor, Elaine + Gilthunder, Escanor + Howzer, Gilthunder + Howzer, Howzer + Tristan, Howzer + Tioreh.

Which Merlin weapon should I build first?

Match it to the element your team needs. Wand (Lightning) is a sustained Overload carry — its window grants +50% Lightning damage. Book (Ice) is a self-sufficient Frost-Mark carry for Cold teams, and Staff (Fire) is a burst finisher whose free Ultimate needs a Fire-Burst enabler. Fund one track before spreading Potential Points.

How does Merlin's Book path deal damage?

Through Frost Mark. Frost Seed and the Glacial Pierce stance stack marks on the target; her Tag Skill, Frost Sweep, then gains +30% damage per mark and removes a max-stack mark for a flat +300% of her Attack. Her passive Infinite Frost also grants +40% Cold Attack and +50% damage against marked enemies, so the loop is seed marks, ramp, then Tag-switch.

What is Overload on the Wand path?

Overload is the buff from her passive Circuit Break. Using a Combined Attack with her Ultimate as the base grants Overload for 25 seconds, increasing her Lightning damage by 50%, and while it's active Judgment of Thunder inflicts Vulnerable (+30% Defense Shatter). Her Ultimate also adds +20% All Elemental Attack to the team on the Combined Attack.

Why does the Staff Ultimate need a Fire Burst?

Her passive Core Ignition only triggers on a Fire Burst: it replaces her Special Attack and Normal Skill with a free (no-Magic) Ultimate for 10 seconds that deals +100% damage against Fire-Burst targets. Without a Fire Burst that window never opens, so Staff wants a Fire-Burst enabler in the team.

Who are Merlin's best Combined-Attack partners?

By the payloads in her data, Drake (461%) is the highest, then Meliodas (449%) and King (433%). Partners that also bring a team buff stand out: King (+30% Magic Charging Efficiency), Diane (+30% Defense and Normal-Skill damage), Escanor (+30% Max HP) and Meliodas (Opening). Her own Ultimates are strong combo bases too.

What does Merlin's world passive do?

Elemental Harmony fires a manually-controlled projectile carrying all five elements (Fire, Wind, Lightning, Earth, Cold). It's a traversal/utility tool that reflects her all-element identity and has no listed combat buff, so it doesn't change the damage on her three weapon kits.