Scuttling Sliver + Trazyn the Infinite + The Eternity Elevator + Runed Stalactite

Scuttling Sliver

Trazyn the Infinite

The Eternity Elevator

Runed Stalactite

How it works

1. Activate Trazyn using The Eternity Elevator's ability by tapping it, adding CCC
2. Activate Trazyn by paying 2, untapping it.
3. Repeat

By equipping Runed Stalactite, Trazyn the Infinite gains every creature type—including Sliver—which crucially turns on Scuttling Sliver's static ability to grant Trazyn the active untap capability for two mana. Meanwhile, The Eternity Elevator rests in your graveyard so that Trazyn's Prismatic Gallery can absorb its massive mana-producing activated abilities. This creates a brilliant self-sustaining loop where Trazyn uses the Elevator to tap for three colorless mana, spends two of that mana to untap via the Sliver ability, and generates infinite colorless mana in the process.