Scuttling Sliver + Trazyn the Infinite + Amorphous Axe + Arc Reactor

Scuttling Sliver

Trazyn the Infinite

Amorphous Axe

Arc Reactor

How it works

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

This clever engine transforms Trazyn the Infinite into a self-contained mana battery by leveraging its Prismatic Gallery ability. With Amorphous Axe sitting in your graveyard, Trazyn counts as every creature type, which thankfully satisfies the type requirement for Scuttling Sliver's activated ability also waiting in your graveyard. That grants Trazyn the power to untap itself for just two mana, while Arc Reactor provides the engine's explosive return by tapping to produce three colorless mana. By tapping Arc Reactor for three and spending two to untap Trazyn via the Sliver's ability, you net one colorless mana each iteration to fuel an infinite loop of colorless energy.