Scuttling Sliver + Trazyn the Infinite + Empowered Autogenerator + Imagecrafter

Scuttling Sliver

Trazyn the Infinite

Empowered Autogenerator

Imagecrafter

How it works

1. Activate Imagecrafter by tapping it, causing Trazyn to become a Sliver until end of turn.
2. Activate Trazyn using Empowered Autogenerator's ability by tapping it, putting a charge counter on Trazyn and adding one mana of any color for each charge counter on Trazyn.
3. Activate Trazyn by paying 2, untapping it.
4. Repeat from step 2.

This clever loop relies on Trazyn the Infinite absorbing the activated abilities of artifact cards in your graveyard, specifically adopting Empowered Autogenerator to generate scaling amounts of mana as it accumulates charge counters. To turn that mana engine into an infinite one, Imagecrafter steps in by temporarily changing Trazyn into a Sliver, which grants him Scuttling Sliver's untap ability. By feeding a portion of the mana produced by Empowered Autogenerator back into Scuttling Sliver's untap cost, Trazyn can untap himself endlessly, continuously fueling more mana and charge counters.