Tomb of Seeping Gods

(Legendary Land Artifact)
This land can only be played in the Command Zone.
At the beginning of your upkeep, add {b}. When spending mana this way to cast a Vampire creature
from your hand, create a 1/1 Vampire Bat token
with Flying onto the battlefield under your control.
When a token is created this way, put a Blood
Counter on the Tomb of Seeping Gods. You may
transform this card when it has 5 or more Blood
Counters on it.