Wulfgar of Icewind Dale

Melee (Whenever this creature attacks, it gets +1/+1 until end of turn for each opponent you attacked this combat.) If a creature you control attacking causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6of9frawm1pb1hi2qridkn.