Metalworker, Pemmin's Aura, and Chromatic Orrery

Prerequisites

• Metalworker on the battlefield
• Pemmin's Aura on the battlefield
• Chromatic Orrery on the battlefield
• Pemmin's Aura attached to Metalworker
• Metalworker does not have summoning sickness
• You have at least one artifact card in hand

Steps

1. Activate Metalworker by tapping it and revealing at least one artifact card from your hand, adding at least
2. Activate Pemmin's Aura's first ability by paying , untapping Metalworker
3. Repeat

Results

• Infinite colored mana
• Infinite colorless mana