Doppelgang + Reiterate

Doppelgang

Reiterate

How it works

1. Cast Doppelgang by paying 9, targeting the three mana-producing permanents.
2. Holding priority, cast Reiterate with buyback by paying 4, copying Doppelgang targeting the three mana-producing permanents, and returning Reiterate to your hand.
3. Resolve the copy of Doppelgang, creating three token copies of the three targeted permanents.
4. Activate six of the permanent copies by tapping them, adding at least 4.
5. Repeat from step 2.
6. Once you have infinite copies of the targeted permanents and mana, you may instead target any other permanents using the Doppelgang copies.
7. You may also repeatedly cast Reiterate to copy any other instant or sorcery spells on the stack, or any that would enter the stack.

This explosive late-game loop begins by casting Doppelgang with a massive investment of mana to target three of your own mana-producing permanents, setting up a board primed for exponential growth. Holding priority, you cast Reiterate targeting that Doppelgang while paying its buyback cost, which immediately returns the instant to your hand as the copy resolves to multiply your mana sources. By tapping your newly minted token copies to more than pay for Reiterate and Doppelgang over and over again, you can eventually target every single permanent on your battlefield for infinite replication.