Rings of Brighthearth, Seeker of Skybreak, and Selvala, Heart of the Wilds

Prerequisites

• Rings of Brighthearth on the battlefield
• Seeker of Skybreak on the battlefield
• Selvala, Heart of the Wilds on the battlefield
• Seeker of Skybreak and Selvala do not have summoning sickness
• You control a creature with power 4 or greater
• available

Steps

1. Activate Selvala by paying and tapping it, adding at least and three mana of any color(s)
2. Activate Seeker of Skybreak by tapping it, targeting itself
3. Rings of Brighthearth triggers, causing you to pay to copy Seeker of Skybreak's ability, targeting Selvala
4. Resolve both Seeker of Skybreak abilities, untapping it and Selvala
5. Repeat

Results

• Infinite colored mana
• Infinite mana creatures you control can produce
• Infinite untap of creatures you control