Scuttling Sliver + Trazyn the Infinite + Amoeboid Changeling + Coveted Jewel

Scuttling Sliver

Trazyn the Infinite

Amoeboid Changeling

Coveted Jewel

How it works

1. Activate Amoeboid Changeling by tapping it, causing Trazyn to become a Sliver until end of turn.
2. Activate Trazyn using Coveted Jewel'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 engine transforms Trazyn the Infinite into an absolute powerhouse by leveraging the graveyard to build a self-sustaining mana machine. Through Amoeboid Changeling's ability, Trazyn temporarily gains all creature types—including Sliver—allowing it to inherit Scuttling Sliver's inherent untap ability. Once Trazyn also acquires the activated mana ability of a discarded or milled Coveted Jewel from the graveyard, it can tap to produce three mana of any color, pay two of that mana to untap itself, and repeat the process endlessly for infinite colored mana.