Shrine of Agony

All creature cards players have in hand have painborn.
Whenever a player pays life, put a charge counter on Shrine of Agony for each life paid.
{t}, Remove two charge counters from Shrine of Agony: add {b} to your mana pool.
"Our guides told us that, on cold winter nights, the screams of the poor wrteches that ended up here can still be heard, pleading for release."
-Senior mage Yoon, Expedition Logbook