Myr Welder + Encroaching Mycosynth + Empowered Autogenerator + Patrol Signaler

Myr Welder

Encroaching Mycosynth

Empowered Autogenerator

Patrol Signaler

How it works

1. Activate Myr Welder using Empowered Autogenerator's ability by tapping it, putting a charge counter on Myr Welder and adding for each charge counter on Myr Welder.
2. Activate Myr Welder using Patrol Signaler's ability by paying 1 and untapping it, creating a 1/1 Kithkin Soldier creature token.
3. Repeat.

This loop turns Myr Welder into a self-sustaining engine by utilizing Encroaching Mycosynth to treat Myr Welder as an artifact, allowing it to legally imprint Empowered Autogenerator and Patrol Signaler directly from the graveyard. Once those abilities are gained, tapping the Welder acts as the Autogenerator to grow charge counters and produce escalating amounts of mana, which easily funds the Patrol Signaler's untap cost to spawn endless Kithkin tokens. Because the Autogenerator's mana production scales with its counters, you quickly generate infinite colored mana, infinite tokens, and infinite entry triggers to overwhelm the battlefield.