Myr Welder + Empowered Autogenerator + Crab Umbra

Myr Welder

Empowered Autogenerator

Crab Umbra

How it works

1. Activate Myr Welder using Empowered Autogenerator's ability by tapping it, putting a charge counter on it and adding for each charge counter on it.
2. Activate Crab Umbra by paying 2, untapping Myr Welder.
3. Repeat.

By having Myr Welder imprint Empowered Autogenerator, the construct gains the ability to tap, grow its own charge counters, and yield escalating amounts of colored mana. Crab Umbra enchants the Welder to provide the crucial untap engine, letting you feed the mana back into the Aura's activation cost while continuously compounding the charge counters. The result is an escalating loop that rapidly generates infinite colored mana of any desired type.