Ice · Assassin · 5★ · 46% RTA win rate
Sez, a lost-hp extinction assassin with damage cap, is a 5★ Ice Assassin in Epic Seven. Sez's biggest weakness: his unhealable mark is just a debuff — a cleanse on the affected ally or a dispel wipes it off, restoring full healing and undoing the one tool that pressures sustain teams. Below are the heroes and team archetypes that counter Sez in RTA, the matchups where Sez struggles most, and how to draft against Sez.
Heroes with the best head-to-head record into Sez from current Champion+ RTA data.
Perfumer Byblis, Empyrean Ilynav, Estelle and other hard counters counter Sez. His unhealable mark is just a debuff — a cleanse on the affected ally or a dispel wipes it off, restoring full healing and undoing the one tool that pressures sustain teams.
Cleanse and dispel: His unhealable mark is just a debuff — a cleanse on the affected ally or a dispel wipes it off, restoring full healing and undoing the one tool that pressures sustain teams. Immunity buffs: An immunity barrier applied before he strikes simply blocks the unhealable debuff from landing, so a prepped enemy team neutralizes that part of his kit outright. Buff steal and shortened buff duration: His attack self-buff and the Combat Readiness gain that fuel his tempo can be stolen or cut short, slowing the extra turns he depends on to chain into finishers. Long cooldowns and conditional triggers: Conviction sits on a six-turn cooldown and Encroach only fires when an ally has already pushed a target to 30% or less; against full-Health, well-defended frontlines with no setup, Sez has little immediate burst and his single-target lethal hit must wait.
In current Champion+ RTA, Perfumer Byblis has one of the strongest records against Sez (64% win rate over 3,510 games).
Healing- and lifesteal-reliant teams: His first skill can stamp an enemy unhealable for a turn, and his lost-HP scaling means the lower a foe is dragged, the harder he hits — so comps that rely on out-healing damage get their recovery shut off right as he finishes the job. Revive and survivability cheese: Conviction's kill applies extinction, blocking the target from being brought back. Enemies leaning on revivers or second-life tricks lose their safety net once Sez secures the kill. Low-Health and chip-softened targets: Damage on every skill grows with the enemy's lost Health, and his passive Encroach auto-fires an AoE hit the moment an ally drops someone to 30% or less, turning a softened backline into clean follow-up kills. Burst assassins and single-hit nukers: Die Hard caps the damage any one attack can deal to him as a share of his max Health, so opponents who depend on a single oversized hit to delete him struggle to land the kill.