Abdel Adrian, Gorion's Ward, Felidar Guardian, and Phantom Steed

Prerequisites

• Abdel Adrian, Gorion's Ward in hand
• Felidar Guardian in exile
• Phantom Steed on the battlefield
• undefined plus enough mana to pay for command tax, if applicable available

Steps

1. Cast Abdel Adrian from the command zone by paying and command tax, if applicable
2. When Abdel Adrian enters the battlefield, it triggers, exiling Phantom Steed and creating a 1/1 Soldier creature token
3. When Phantom Steed leaves the battlefield, Felidar Guardian returns from exile to the battlefield
4. When Felidar Guardian enters the battlefield, it triggers, blinking Abdel Adrian
5. Abdel Adrian leaves and re-enters the battlefield, causing Phantom Steed to return from exile to the battlefield, and triggering both Phantom Steed and Abdel Adrian's abilities
6. Resolve the Phantom Steed trigger, exiling Felidar Guardian until Phantom Steed leaves the battlefield
7. Resolve the Abdel Adrian trigger, exiling Phantom Steed and creating a 1/1 Soldier creature token
8. Repeat from step 3

Results

• Infinite LTB
• Infinite ETB
• Infinite creature tokens
• Infinite blinking of nonland permanents you control