Magosi, the Waterveil + The Ozolith + Cayth, Famed Mechanist + Natural Emergence

Prerequisites

• Magosi has at least one eon counter on it and does not have summoning sickness.

Steps

1. 1During your precombat main phase, use Cayth to put an additional eon counter on Magosi.
2. 2Activate Magosi's third ability by tapping it, removing an eon counter from it and returning it from the battlefield to your hand.
3. 3When Magosi leaves the battlefield, The Ozolith's first ability triggers due to Natural Emergence, putting an eon counter on The Ozolith.
4. 4Resolve the Magosi ability, causing you to take an extra turn after this one.
5. 5Play Magosi.
6. 6At the beginning of your combat phase, The Ozolith triggers, moving an eon counter from itself onto Magosi.
7. 7Repeat each turn.

Effects

• Infinite turns
• Lock