Myr Welder, Seedcradle Witch, and Empowered Autogenerator

Prerequisites

• Myr Welder on the battlefield
• Seedcradle Witch on the battlefield
• Empowered Autogenerator in exile
• available

Steps

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 Seedcradle Witch by paying , untapping Myr Welder and giving it +3/+3 until end of turn
3. Repeat

Results

• Infinite colored mana
• Infinite untap of creatures you control
• Infinite mana creatures you control can produce
• Infinitely large creature until end of turn