Urza, Prince of Kroog + Doubling Cube + Swiftfoot Boots

Urza, Prince of Kroog

Doubling Cube

Swiftfoot Boots

How it works

1. Float at least 11.
2. Activate Doubling Cube by paying 3 and tapping it, adding at least 8.
3. Activate Urza by paying 6, creating a token copy of Doubling Cube that is a 1/1 Soldier.
4. Activate Swiftfoot Boots' equip ability by paying 1, attaching it to the Doubling Cube token.
5. Repeat from step 2 using the Doubling Cube token instead.
6. Once you have infinite mana, you may target any artifact you control to get infinite copies of them.

This magnificent engine harnesses the sheer exponential growth of Doubling Cube by rapidly bypassing its tap requirement through token generation. By using Urza, Prince of Kroog to forge a fresh, untapping token copy of the Cube, you sidestep the restriction on the original. Meanwhile, Swiftfoot Boots grants the newly minted copy haste, allowing the clone to tap for mana and double your reserves immediately. As the mana snowballs into infinity, Urza's sixth ability can then be pointed at any other artifact you control, flooding the board with boundless copies.