Trazyn the Infinite + Empowered Autogenerator + Basalt Monolith

Trazyn the Infinite

Empowered Autogenerator

Basalt Monolith

How it works

1. Activate Trazyn using Empowered Autogenerator's ability by tapping it, putting a charge counter on Trazyn and adding one mana of any color for each charge counter on Trazyn.
2. Activate Trazyn using Basalt Monolith's ability by paying 3, untapping Trazyn.
3. Repeat.