Dire Fleet Warmonger

At the beginning of combat on your turn, you may sacrifice another creature. If you do, this creature gets +2/+2 and gains trample until end of turn. (It can deal excess combat damage to the player or planeswalker it's attacking.)

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6o5okh32ydpb1h9f01pedw.