Autarch Mammoth

When this creature enters and whenever it attacks while saddled, create a 3/3 green Elephant creature token. Saddle 5 (Tap any number of other creatures you control with total power 5 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/cms6oaifr702vpb1hllsttj76.