Requires

Orvar, the All-Form must be on the battlefield. Clockspinning must be in hand. Roaming Throne must be on the battlefield (with any creature type chosen). You control a nonlegendary permanent that enters the battlefield untapped and that can tap to produce at least . Mana needed:

Steps

1. Cast Clockspinning with buyback by paying , targeting Roaming Throne.
2. Orvar triggers twice, creating two token copies of Roaming Throne.
3. Resolve Clockspinning, returning it to your hand.
4. Cast Clockspinning with buyback by paying , targeting Roaming Throne.
5. Orvar triggers four times, creating four token copies of Roaming Throne.
6. Resolve Clockspinning, returning it to your hand.
7. Cast Clockspinning with buyback by paying , targeting any nonlegendary permanent you control that enters the battlefield untapped and that can tap to produce at least .
8. Orvar triggers eight times, creating eight copies of the mana-producing permanent.
9. Resolve Clockspinning, returning it to your hand.
10. Activate four of the copies of the mana-producing permanent by tapping them, adding at least .
11. Repeat from step 7.

Results