The Obelisk

: Whenever a creature you control is sacrificed, move all Insanity counters on it to The Obelisk. The Obelisk uses Insanity counters as loyalty.
-10: Put 10 insanity counters on target creature, if that creature has more Insanity counters than toughness, its owner sacrifices it.
-20: You get an emblem with, "Whenever a creature is sacrificed, you gain mana of any color equal to the number of Insanity counters on it.