Emrakul's Pendant

Devoid

Whenever you lose life add a blood counter to
Emrakul's Pendant.
At the beginning of each Main Phase, you
may remove a blood counter from Emrakul's
Pendant. If you do, add {1} to your mana pool.

{t}: Add {2} to your mana pool. Use this mana only
to cast Colorless Eldrazi Spells.