Lithoform Engine + Tezzeret the Seeker + Gilded Lotus

Lithoform Engine

Tezzeret the Seeker

Gilded Lotus

How it works

1. Activate Tezzeret the Seeker's first ability by putting a loyalty counter on it.
2. Holding priority, activate Gilded Lotus by tapping it, adding three mana of any color.
3. Activate Lithoform Engine's first ability by paying 2 and tapping it, copying Tezzeret the Seeker's ability, targeting Lithoform Engine and Gilded Lotus.
4. Resolve the copy of Tezzeret the Seeker's ability, untapping Gilded Lotus and Lithoform Engine.
5. Repeat from step 2.

This clever engine turns Tezzeret the Seeker into an infinite untap machine by leveraging the artifact-copying prowess of Lithoform Engine. As Gilded Lotus taps for three mana, you feed two of that mana into Lithoform Engine to copy Tezzeret's loyalty ability, targeting both artifacts to ready them for another iteration. Because Tezzeret's untap targets can include the very pieces driving the loop, this self-sustaining sequence lets Gilded Lotus flood your mana pool with limitless colors while keeping Lithoform Engine and Tezzeret the Seeker primed to repeat the process indefinitely.