Myr Welder, Umbral Mantle, and Empowered Autogenerator

Prerequisites

• Myr Welder on the battlefield
• Umbral Mantle on the battlefield
• Empowered Autogenerator in exile
• Umbral Mantle attached to Myr Welder
• Myr Welder does not have summoning sickness
• available

Steps

1. Activate Myr Welder using Empowered Autogenerator's ability by tapping it, putting a charge counter on Myr Welder and adding one mana of any color for each charge counter on Myr Welder
2. Activate Myr Welder by paying and untapping it, giving it +2/+2 until end of turn
3. Repeat

Results

• Infinite charge counters on Myr Welder
• Infinite colored mana
• Infinitely large Myr Welder until end of turn