Dragonslayer

A large half-­troll of unknown descent. His original name remains unknown; the only communication he will have with others concerns his overwhelming desire to destroy any dragon, or dragon­-like being he can find. Obsessive and perpetually enraged, he is normally given a wide berth.

Dragonslayer suffers from Frenzy, so he needs to move as much as possible. He has Sweep all the way to his last click and has 2 clicks of Invulnerability, then later gets Toughness until he gains Regeneration on his last two clicks. And don't forget his Berserk ability that delivers 5 damage two clicks before he dies.
Released as a Unique Mage Spawn from the Dragon's Gate expansion set.