Mirage

Mangara's Equity

When you play Mangara's Equity, choose black or red.
During your upkeep, pay o1o
W or bury Mangara's Equity.
For each 1 damage a creature of the chosen color deals to you or a white creature you control, Mangara's Equity deals 1 damage to that creature.

As Mangara's Equity enters, choose black or red.
At the beginning of your upkeep, sacrifice Mangara's Equity unless you pay {1}{W}.
Whenever a creature of the chosen color deals damage to you or a white creature you control, Mangara's Equity deals that much damage to that creature.