Scuttling Sliver + Trazyn the Infinite + Amoeboid Changeling + Gilded Lotus

Scuttling Sliver

Trazyn the Infinite

Amoeboid Changeling

Gilded Lotus

How it works

1. Activate Amoeboid Changeling by tapping it, causing Trazyn to become a Sliver until end of turn.
2. Activate Trazyn using Gilded Lotus's ability by tapping it, adding three mana of any color.
3. Activate Trazyn by paying 2, untapping it.
4. Repeat from step 2.

This clever setup turns your graveyard and battlefield into an infinite mana engine by leveraging Trazyn the Infinite's ability to absorb the traits of your artifacts. With Gilded Lotus sitting in the graveyard to provide a massive injection of three mana per tap, Trazyn needs a way to untap repeatedly—which is where Scuttling Sliver's activated ability comes in, also borrowed directly from the graveyard. Finally, Amoeboid Changeling plays the crucial role of bestowing the Sliver creature type upon Trazyn, satisfying the prerequisite needed to legally activate that untap ability. Once Trazyn is a Sliver, you can endlessly tap the Gilded Lotus mana for a profit and use the Scuttling Sliver untap ability to reset, generating infinite colored mana.