Heroes' Bane

Oracle Text

Heroes' Bane enters the battlefield with four +1/+1 counters on it.

2GG: Put X +1/+1 counters on Heroes' Bane, where X is its power.

Card Rulings

11/17/2017 The value of X is determined using the power of Heroes’ Bane when the ability resolves.
11/17/2017 If Heroes’ Bane’s power is less than 0 when its second ability resolves, X is considered to be 0.