Revax, From the Depths

When you play a land you may reveal Revax, From the Depths from your hand or graveyard to put a Tomb counter on it, if you do you may sacrifice this land at any time and pay {b}{b}{b}{b}{b} or {g}{g}{g}{g}{g} to put Revax, From the Depths onto the battlefield
Infect, Reach, Skulk, Deathtouch
From the Depths I've come, your death, your nemesis, you can not stop me...