Kinbinding

Creatures you control get +X/+X, where X is the number of creatures that entered the battlefield under your control this turn. At the beginning of combat on your turn, create a 1/1 green and white Kithkin creature token.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6ohfgdcig7pb1hxk6mhhun.