Abdel Adrian, Gorion's Ward, Changeling Titan, and Phantom Steed

Prerequisites

• Abdel Adrian, Gorion's Ward in hand or on the battlefield or in exile
• Changeling Titan in hand or on the battlefield or in exile
• Phantom Steed in hand or on the battlefield or in exile
• plus the mana cost of the creature in your hand available

Steps

1. Cast Abdel Adrian for its mana cost
2. When Abdel Adrian enters, it exiles Changeling Titan until Abdel Adrian leaves the battlefield
3. Resolve any additional effects of Abdel Adrian's ETB
4. When Changeling Titan leaves the battlefield, Phantom Steed is returned from exile to the battlefield
5. When Phantom Steed enters, it exiles Abdel Adrian until Phantom Steed leaves the battlefield
6. Resolve any additional effects of Phantom Steed's ETB
7. When Abdel Adrian leaves the battlefield, Changeling Titan is returned from exile to the battlefield
8. When Changeling Titan enters, it exiles Phantom Steed until Changeling Titan leaves the battlefield
9. Resolve any additional effects of Changeling Titan's ETB
10. When Phantom Steed leaves the battlefield, Abdel Adrian is returned from exile to the battlefield
11. Repeat from step 2

Results

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