Galvanic Key, Rings of Brighthearth, and Everflowing Chalice

Prerequisites

• Galvanic Key on the battlefield
• Rings of Brighthearth on the battlefield
• Everflowing Chalice on the battlefield

Steps

1. Activate Everflowing Chalince by tapping it, adding at least
2. Activate Galvanic Key by paying and tapping it
3. When you activate Galvanic Key, Rings of Brighthearth triggers, causing you to pay to copy that ability
4. Resolve one copy of the Galvanic Key ability, untapping Everflowing Chalice
5. Repeat

Results

• Infinite colorless mana
• Infinite untap of artifacts
• Infinite mana artifacts you control can produce