Frostvur, the Frozen Beast

Frostbite (Whenever this creature deals damage to a
creature, tap that creature. It doesn't untap during its
controller's next untap step.)
Berserk (Whenever this creature attacks, you may
remove it from combat. If you do, it fights target
creature.)
{2}{u}{r}, {t}: Tap target permanent. Frostvur
deals 1 damage to any target.