Berserker
Berserker is a creature class. Berserkers are combatants who enter a frenzy in battle, gaining great speed and battle prowess.
Common abilities for berserkers are haste, rampage, and bloodthirst. Most berserkers are red or green. Examples include: Vulshok Berserker, Ghor-Clan Savage, Kill-Suit Cultist and Raging Goblin.
Berserker debuted as a creature type in Mirrodin. Ærathi Berserker from Legends, is the eldest card to gain the type retroactively.