Wurm's Tooth

Whenever a player casts a red spell, you may gain 1 life.

Flying You can't lose the game and your opponents can't win the game.

Destroy target creature with flying.

This land enters tapped unless you control a Swamp or a Mountain. T: Add B or R.

(T: Add G.)

First strike (This creature deals combat damage before creatures without first strike.) Protection from white (This creature can't be blocked, targeted, dealt damage, or enchanted by anything white.)

(T: Add U.)