Throne of Eldraine, Vesuvan Duplimancy, and Whim of Volrath

Prerequisites

• Throne of Eldraine on the battlefield
• Vesuvan Duplimancy on the battlefield
• Whim of Volrath in hand

Steps

1. Activate Throne of Eldraine by tapping it, adding that can only be spent to cast monoblue spells
2. Cast Whim of Volrath with buyback by paying , targeting Throne of Eldraine
3. Vesuvan Duplimancy triggers, creating a nonlegendary token copy of Throne of Eldraine
4. Choose "Blue" as the token enters
5. Resolve Whim of Volrath, returning it to your hand
6. Repeat, tapping the Throne of Eldraine token instead

Results

• Infinite colored mana that can only be spent to cast monocolored spells
• Infinite magecraft triggers
• Infinite storm count