Magosi, the Waterveil + Kelpie Guide + Lithoform Engine

Magosi, the Waterveil

Kelpie Guide

Lithoform Engine

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 Kelpie Guide 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 Lithoform Engine 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 intricate loop bends time to your will by taking advantage of Lithoform Engine to double the payout of Magosi, the Waterveil. You begin by storing up an eon counter and paying the ultimate price—skipping a future turn—which is then cleanly bypassed because copying Magosi's final ability with Lithoform Engine generates two extra turns to cancel out that debt entirely. Meanwhile, Kelpie Guide plays a crucial supporting role by untapping Magosi on demand, allowing you to bounce the land back to your hand and replay it fresh each iteration to sustain the infinite sequence.