Magosi, the Waterveil + Nesting Grounds + Karn's Bastion

Prerequisites

• Magosi has at least one eon counter on it.

Steps

1. 1Activate Karn's Bastion's last ability by paying and tapping it, putting an eon counter on Magosi.
2. 2Activate Nesting Grounds's last ability by paying and tapping it, moving an eon counter from Magosi to Nesting Grounds.
3. 3Activate Magosi's last ability by tapping it, removing an eon counter from it, and returning it to your hand, taking an extra turn after this one.
4. 4Play Magosi from your hand.
5. 5Move to your next turn.
6. 6Activate Karn's Bastion's last ability by paying and tapping it, putting an eon counter on Nesting Grounds.
7. 7Activate Nesting Grounds's last ability by paying and tapping it, moving an eon counter from Nesting Grounds to Magosi.
8. 8Repeat from step 3.

Effects

• Infinite turns
• Lock