using mtg cards in d&d How to Spot Counterfeit Magic: The Gathering Can Inti, Seneschal of the

Casting Cost: Card Text: Increment (Whenever you cast a spell, if the amount of mana you spent is greater than this creature's power or toughness, put a +1/+1 counter on this creature.) When this creature dies, if it had one or more counters on it, create a 0/0 green and blue Fractal creature token, then put this creature's counters on that token

The Brothers' War set (see "The Brothers' War' Product Line")

Generous Ent is a 5/7 Treefolk with Reach and generates a Food token upon entering the battlefield, and Feasting Hobbit uses Devour to accrue +1/+1 counters according to how many Food tokens you sacrifice when he ETBs

You generally need something like these cards to make that work