Thanos

+5: You lose 1 life, target opponent casts a 1/1 vampire creature token with lifelink
-10: Thanos turns into a 10/10 creature with lifelink untill end of turn
-20: All players(Excluding Thanos' owner) drop to 1 life, Thanos' owner sends half of all target creatures to graveyard thanos is exhiled for 5 rounds