All permanents on the battlefield (Sword of the Paruns attached to The Jolly Balloon Man).
You control at least one additional nonlegendary creature.
You control at least three creatures that are either Balloons or that share a creature type with the nonlegendary creature.
({1} magic symbol) available.
Steps
Activate The Jolly Balloon Man by paying ({1} magic symbol) and tapping it, creating a token copy of a nonlegendary creature you control that is a 1/1 Balloon with flying and haste.
When the creature token enters the battlefield, Mana Echoes triggers, adding ({C} magic symbol) for creature you control that shares a creature type with the creature token.
Activate Sword of the Paruns by paying ({3} magic symbol) , untapping The Jolly Balloon Man.
Repeat.
Results
Infinite LTB.
Infinite ETB.
Infinite sacrifice triggers.
Infinite death triggers.
Infinite colorless mana.
Infinite creature tokens with haste.
Infinite token copies of each other creature you control with haste.