Tainted Immortal

Indestructible
Whenever a source deals damage to Tainted
Immortal, put a -1/-1 counter on Tainted
Immortal.
{g/u}{g/u}, {t}, Sacrifice Tainted Immortal: Add {b} equal to the number of -1/-1 counters that
were on Tainted Immortal when you sacrificed it.