Athreos, Shroud-Veiled + Blue, Loyal Raptor + Yahenni, Undying Partisan

Athreos, Shroud-Veiled

Blue, Loyal Raptor

Yahenni, Undying Partisan

How it works

1. Cast the Dinosaur in your hand by paying its mana cost. It will enter with a coin counter due to Blue.
2. Activate Yahenni by sacrificing the Dinosaur.
3. When the Dinosaur dies, Athreos's second ability triggers, returning the Dinosaur from your graveyard to the battlefield. It will enter with a coin counter due to Blue.
4. Resolve the Yahenni ability.
5. Repeat from step 2.