Requires

The Jolly Balloon Man must be in exile (exiled by Agatha's Soul Cauldron). Agatha's Soul Cauldron must be on the battlefield. Midnight Guard must be on the battlefield. Ardent Electromancer must be on the battlefield. Midnight Guard has at least one +1/+1 counter on it. Midnight Guard does not have summoning sickness. Mana needed:

Steps

1. Activate Midnight Guard using The Jolly Balloon Man's ability by paying and tapping it, creating a token copy of Ardent Electromancer that is a 1/1 Balloon with flying and haste in addition to its other types.
2. When the Ardent Electromancer token enters the battlefield, it and Midnight Guard trigger.
3. Resolve the Ardent Electromancer token's trigger, adding at least .
4. Resolve the Midnight Guard trigger, untapping it.
5. Repeat.

Results