Volatile Temple

Volatile Temple enters tapped with a number of steam counters equal to the number of creatures you control.

{1}: Whenever a creature dies this turn, put a steam counter on Volatile Temple.

{t}: Add {c} to your mana pool.
{t}, Remove a steam counter: Add {r}{u} to your mana pool.
{t}, Pay X life and remove X steam counters: Deal X damage to any target.