Blossoming Tortoise + Deserted Temple + Rings of Brighthearth + Lotus Field

Prerequisites

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Steps

1. 1Activate Lotus Field by tapping it, adding three mana of any color
2. 2Activate Deserted Temple's second ability by tapping it, targeting Lotus Field.
3. 3Rings of Brighthearth triggers, causing you to pay to copy Deserted Temple's ability, targeting Deserted Temple.
4. 4Resolve both Deserted Temple abilities, untapping Deserted Temple and Lotus Field
5. 5Repeat

Effects

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