Abdel Adrian, Gorion's Ward, Worldgorger Dragon, and Changeling Titan

Prerequisites

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

Steps

1. Cast Worldgorger Dragon for its mana cost
2. When Worldgorger Dragon enters, it exiles Abdel Adrian until Worldgorger Dragon leaves the battlefield
3. Resolve any additional effects of Worldgorger Dragon's ETB
4. When Abdel Adrian leaves the battlefield, Changeling Titan is returned from exile to the battlefield
5. When Changeling Titan enters, it exiles Worldgorger Dragon until Changeling Titan leaves the battlefield
6. Resolve any additional effects of Changeling Titan's ETB
7. When Worldgorger Dragon leaves the battlefield, Abdel Adrian is returned from exile to the battlefield
8. When Abdel Adrian enters, it exiles Changeling Titan until Abdel Adrian leaves the battlefield
9. Resolve any additional effects of Abdel Adrian's ETB
10. When Changeling Titan leaves the battlefield, Worldgorger Dragon 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 blinking of permanents
• Infinite mana lands you control can produce