Herd Baloth + Yahenni, Undying Partisan + Yuna, Grand Summoner

Herd Baloth

Yahenni, Undying Partisan

Yuna, Grand Summoner

How it works

1. Cast Herd Baloth by paying its mana cost.
2. When Herd Baloth enters, the effect that adds +1/+1 counters to entering creatures triggers or applies its replacement effect, putting at least one +1/+1 counter on Herd Baloth.
3. Herd Baloth triggers, creating a creature token.
4. When the creature token enters, that same effect causes you to place at least one +1/+1 counter on it.
5. Activate Yahenni by sacrificing the creature token.
6. When the creature token dies, Yuna triggers, putting at least one +1/+1 counter on Herd Baloth
7. Repeat steps 3 and 4 once.
8. Resolve the Yahenni ability.
9. Repeat from step 5.