Scuttling Sliver + Trazyn the Infinite + Dreamstone Hedron + Amorphous Axe

Scuttling Sliver

Trazyn the Infinite

Dreamstone Hedron

Amorphous Axe

How it works

1. Activate Trazyn using Dreamstone Hedron's ability by tapping it, adding CCC
2. Activate Trazyn by paying 2, untapping it.
3. Repeat.

This engine transforms Trazyn the Infinite into a self-contained power plant by leveraging the graveyard and battlefield in tandem. Because Amorphous Axe makes Trazyn every creature type, he gains the untap ability granted by Scuttling Sliver. Once Dreamstone Hedron hits the graveyard, its mana-producing power is inherited by Trazyn through Prismatic Gallery, allowing him to tap for three colorless mana. You can then spend two of that mana to activate Scuttling Sliver's untap ability on Trazyn, leaving you with infinite colorless mana and infinite untaps.