The Jolly Balloon Man and Mondrak on the battlefield.
You control a permanent that enters the battlefield untapped and can tap to produce at least ({1} magic symbol) .
Steps
Activate a permanent you control by tapping it, adding at least ({1} magic symbol) .
Activate The Jolly Balloon Man by paying ({1} magic symbol) and tapping it, creating two token copies of Felidar Guardian that are 1/1 Balloons with haste.
When the Felidar Guardian tokens enter the battlefield, they trigger, blinking the mana-producing permanent and The Jolly Balloon Man.