Repulsive Mutation
{X}{G}{U}Instant
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Put X +1/+1 counters on target creature you control. Then counter up to one target spell unless its controller pays mana equal to the greatest power among creatures you control.
Official rulings
- If you control no creatures as Repulsive Mutation is resolving, the amount of mana the target spell's controller must pay to stop their spell from being countered is 0. That player can choose not to pay 0 mana; if they do, the spell will be countered. (2024-02-02)
Cards like this
Functionally similar cards by meaning — playable in Repulsive Mutation’s colours.
