Magosi, the Waterveil + Fatestitcher + Adric, Mathematical Genius

Magosi, the Waterveil

Fatestitcher

Adric, Mathematical Genius

How it works

1. Activate Magosi's second activated ability by paying and tapping it, putting an eon counter on Magosi and skipping your next turn.
2. Activate Fatestitcher by tapping it, untapping Magosi.
3. Activate Magosi's third activated ability by tapping it, removing an eon counter from it, and returning it to your hand.
4. Holding priority, activate Adric by paying 2 and tapping it, copying Magosi's ability.
5. Resolve both instances of Magosi's ability, causing you to take two extra turns after this one.
6. Play Magosi.
7. Move to your second extra turn. The first extra turn will be skipped due to the ability activated in step 1.
8. Repeat.

This brilliant temporal loop lets you manipulate time itself by exploiting Magosi, the Waterveil to bank extra turns while cleverly bypassing its drawback. Normally, taking the extra turn requires returning Magosi to your hand and skipping a turn, but Fatestitcher provides the crucial untap power to fuel the land repeatedly, while Adric, Mathematical Genius steps in to double the payoff by copying Magosi's ability on the stack. Because Adric's copy creates an additional extra turn, the first extra turn completely cancels out the skipped turn you accepted earlier, leaving you with an unbroken chain of infinite turns to lock out the entire table.