Love on the Battlefield

Whenever you attack with exactly two creatures, those creatures gain first strike until end of turn, then draw a card. Whenever either of those creatures deals combat damage to a player this combat, put a +1/+1 counter on it.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6o91b45um1pb1hvbdj4lx4.