Rings of Brighthearth, Seeker of Skybreak, and Bloom Tender

Prerequisites

• Rings of Brighthearth on the battlefield
• Seeker of Skybreak on the battlefield
• Bloom Tender on the battlefield
• Bloom Tender and Seeker of Skybreak do not have summoning sickness
• There are at least three colors among permanents you control

Steps

1. Activate Bloom Tender by tapping it, adding at least three mana of different colors
2. Activate Seeker of Skybreak by tapping it
3. Rings of Brighthearth triggers, allowing you to pay to copy Seeker of Skybreak's ability and choose a new target for the copy
4. Resolve both copies of Seeker of Skybreak's ability, untapping Seeker of Skybreak and Bloom Tender
5. Repeat
6. Once you have infinite mana, you may untap any creature instead of Bloom Tender in step 4

Results

• Infinite colored mana
• Infinite untap of creatures