Who Counters Mercedes in Epic Seven?

Briar Witch Iseria, Shepherd of the Dark Diene, Boss Arunka and other hard counters counter Mercedes. Her whole rhythm depends on holding her self Attack buff to trigger the free re-cast; a hero who steals that buff or cuts its duration shuts off her bonus attack and weakens her damage.

Enemies that steal or shorten buffs: Her whole rhythm depends on holding her self Attack buff to trigger the free re-cast; a hero who steals that buff or cuts its duration shuts off her bonus attack and weakens her damage. Enemies that dispel her: Strip the Attack buff she grants herself and she loses both the damage boost and the extra area attack, leaving her with just her on-cooldown hits. Cooldown windows: Her area attacks sit on 3- and 4-turn cooldowns, so after she fires them she has only her two-target basic attack, giving fast or bursty foes a window to punish her. Tanky single targets and survivability tricks: Her dispel is only a chance and her damage is spread across everyone, so a single durable threat or one that survives through revives or invincibility can outlast her spread-out pressure.

Teams that lean on protective buffs: Her area attack has a chance to dispel a buff from every enemy, so shields, immunity, and other defensive buffs across the whole roster can be peeled off rather than fought through. Buff-stacking and buff-reliant comps: Because she strips buffs from the entire team at once, enemies who pile on or depend on Attack, defense, or speed buffs lose the advantages their strategy is built on. Multiple grouped threats at once: Both her second and third skills hit all enemies, letting her chip or finish several targets in one turn instead of trading blows one-on-one. Slower setups she can race: Her basic attack pushes her own turn forward by 15%, and her self Attack buff gives a free repeat of her area attack, letting her get rolling and apply pressure faster than her base speed suggests.