Trazyn the Infinite + Grim Monolith + Prismatic Geoscope

Trazyn the Infinite

Grim Monolith

Prismatic Geoscope

How it works

1. Activate Trazyn using Prismatic Geoscope's ability by tapping it, adding five mana of any color.
2. Activate Trazyn using Grim Monolith's ability by paying 4, untapping Trazyn.
3. Repeat.

Trazyn the Infinite serves as the ultimate engine for this combination by wielding the Prismatic Gallery ability, which grants him access to every activated ability sitting inside your graveyard. By utilizing Grim Monolith's ability, Trazyn can untap himself for four mana, while Prismatic Geoscope's domain ability simultaneously taps to generate five mana of any color. This creates a closed loop where the mana generated outpaces the cost of the untap, allowing you to cycle the abilities infinitely and flood your mana pool with limitless colored and colorless mana.