Hearts of Cinder

Exploit (when this enchantment enters the battlefield, you may sacrifice a creature).
Whenever you sacrifice a Human, you may pay {b/r}{b/r}. If you do, create a 3/3 red Elemental creature token with haste and protection from red.
"Dragons and elves will rain fire on us. With this gift, I will inoculate you!"
-King Viren of Katolis