Karn, the Great Creator + Pemmin's Aura + Coveted Jewel
Karn, the Great Creator
Pemmin's Aura
Coveted Jewel
Requires
Karn, the Great Creator must be on the battlefield.
Pemmin's Aura must be in hand.
Coveted Jewel must be on the battlefield.
Mana needed: 
Steps
- Activate Karn's first loyalty ability, causing Coveted Jewel to become an artifact creature until end of turn.
- Cast Pemmin's Aura by paying , enchanting Coveted Jewel.
- Activate Coveted Jewel by tapping it, adding .
- Activate Pemmin's Aura by paying , untapping Coveted Jewel.
- Repeat from step 2.
Results
Infinite colored mana.
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