Vampiric Mastery

At the beginning of your upkeep, put a blood
counter on this permanent. Then for each
blood counter, draw a card and create a 2/2
black vampire creature token with deathtouch.
At the beginning of your end step, if you control
no vampire creatures, you lose the game.
"First it's dinosaurs. Now it's VAMPIRES?!"
-- Light Yagami, enraged beyond belief