Elvish Fury

Buyback {4} (You may pay an additional {4} as you cast this spell. If you do, put this card into your hand as it resolves.)
Target creature gets +2/+2 until end of turn.

Fail to respect the forest and you will fertilize it.

The List

Modern Horizons

Tempest Remastered

Tempest

Buyback o4 (You may pay an additional o4 when you play this spell. If you do, put it into your hand instead of your graveyard as part of the spell's effect.)
Target creature gets +2/+2 until end of turn.

If the target creature is an illegal target by the time Elvish Fury tries to resolve, the spell doesn’t resolve. If its buyback cost was paid, you won’t return it to your hand.