The Jolly Balloon Man and Mana Echoes on the battlefield.
({1} magic symbol) available.
Steps
Activate The Jolly Balloon Man by paying ({1} magic symbol) and tapping it, creating a token copy of Wispweaver Angel that is a 1/1 Balloon with flying and haste in addition to its other types.
The token copy of Wispweaver Angel enters, triggering itself and Mana Echoes.
Resolve the Mana Echoes trigger, adding at least ({C} magic symbol) ({C} magic symbol) .
Resolve the Wispweaver Angel trigger, blinking The Jolly Balloon Man.