Kilo, Apogee Mind, Magosi, the Waterveil, and Resourceful Defense

Prerequisites

• Kilo, Apogee Mind on the battlefield
• Magosi, the Waterveil on the battlefield
• Resourceful Defense on the battlefield
• each extra turn available

Steps

1. Tap Kilo by any method, triggering Kilo, causing you to proliferate and put an eon counter on Magosi
2. Activate Magosi's third ability by tapping it, removing an eon counter from it and returning it from the battlefield to your hand
3. When Magosi leaves the battlefield, Resourceful Defense triggers, putting an eon counter on Kilo
4. Resolve the Magosi ability, causing you to take an extra turn after this one
5. Play Magosi
6. Move to your next turn
7. Tap Kilo by any method, triggering Kilo, causing you to proliferate and put an eon counter on Kilo
8. Activate Resourceful Defense by paying , moving an eon counter from Kilo onto Magosi
9. Activate Magosi's third ability by tapping it, removing an eon counter from it and returning it from the battlefield to your hand
10. When Magosi leaves the battlefield, Resourceful Defense triggers, moving no counters
11. Repeat from step 4

Results

• Infinite turns