The Jolly Balloon Man + Ertha Jo, Frontier Mentor + Sparring Mummy

The Jolly Balloon Man

Ertha Jo, Frontier Mentor

Sparring Mummy

How it works

1. Activate a mana-producing creature by tapping it, adding at least 1.
2. Activate The Jolly Balloon Man by paying 1 and tapping it, targeting the mana-producing creature.
3. Ertha Jo triggers, copying The Jolly Balloon Man's ability, targeting Sparring Mummy.
4. Resolve the copy of The Jolly Balloon Man's ability, creating a token copy of Sparring Mummy that is a 1/1 Balloon with haste.
5. When Sparring Mummy enters the battlefield, it triggers, untapping The Jolly Balloon Man.
6. Resolve the Jolly Ballon Man ability from step 2, creating a token copy of the mana-producing creature that is a 1/1 Balloon with haste.
7. Activate the mana-producing creature token by tapping it, adding at least 1.
8. Repeat from step 2.