All-Out Assault, Felidar Guardian, and Splinter Twin

Prerequisites

• All-Out Assault in hand or on the battlefield
• Felidar Guardian on the battlefield
• Splinter Twin on the battlefield
• if All-Out Assault is in your hand available

Steps

1. Cast All-Out Assault by paying
2. When All-Out Assault enters the battlefield, it triggers, causing you to get an additional combat and main phase after this one
3. Move to your next combat phase, and declare any creature as an attacker
4. All-Out Assault triggers, untapping all creatures you control
5. Move to your next main phase
6. Activate Felidar Guardian by tapping it, creating a token copy of it with haste
7. When the Felidar Guardian token enters the battlefield, Felidar Guardian triggers, blinking All-Out Assault
8. Repeat from step 2

Results

• Infinite LTB
• Infinite ETB
• Infinite combat phases
• Infinite creature tokens with haste
• Infinite untap of creatures you control
• Infinite mana creatures you control can produce