Requires

Magosi, the Waterveil must be on the battlefield. The Ozolith must be on the battlefield. Nature's Revolt must be on the battlefield. Contagion Engine must be on the battlefield. Magosi has at least one eon counter on it and does not have summoning sickness. It is your precombat main phase. Mana needed: each turn

Steps

1. During your precombat main phase, activate Contagion Engine by paying and tapping it, putting two eon counters 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, The Ozolith's first ability triggers, putting an eon counter on The Ozolith.
4. Resolve the Magosi ability, causing you to take an extra turn after this one.
5. Play Magosi.
6. At the beginning of your combat phase, The Ozolith triggers, putting two eon counters on Magosi.
7. Repeat each turn.

Results