Xul-duc, Lord of Unlife

Lifelink, Deathtouch
Eminence - At the beginning of your first upkeep, gain 20 life. At the beginning of each end step, if you have 100 life, you lose the game; if you have 0 life, you win the game instead. Damage dealt to you by creatures or spells causes you to increase life rather than lose it. You can't pay life.