The Jolly Balloon Man, Mana Echoes, and Felidar Guardian

Prerequisites

• The Jolly Balloon Man on the battlefield
• Mana Echoes on the battlefield
• Felidar Guardian in hand
• available

Steps

1. Activate The Jolly Balloon Man by paying and tapping it, creating a token copy of Felidar Guardian that is a 1/1 Balloon with flying and haste in addition to its other types
2. The token copy of Felidar Guardian enters, triggering itself and Mana Echoes
3. Resolve the Mana Echoes trigger, adding at least
4. Resolve the Felidar Guardian trigger, blinking The Jolly Balloon Man
5. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite creature tokens with haste
• Infinite colorless mana