Stubborn Burrowfiend

Whenever this creature becomes saddled for the first time each turn, mill two cards, then this creature gets +X/+X until end of turn, where X is the number of creature cards in your graveyard. Saddle 2 (Tap any number of other creatures you control with total power 2 or more: This Mount becomes saddled until end of

turn. Saddle only as a sorcery.)

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6odius9i0ppb1h96do79ax.