Urza, Prince of Kroog + Doubling Cube + Lightning Greaves

Urza, Prince of Kroog

Doubling Cube

Lightning Greaves

How it works

1. Float at least 10.
2. Activate Doubling Cube by paying 3 and tapping it, adding at least 7.
3. Activate Urza by paying 6, creating a token copy of Doubling Cube that is a 1/1 Soldier.
4. Activate Lightning Greaves' equip ability by paying 0, 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 clever engine transforms a simple mana-doubling loop into a game-winning spectacle by leveraging continuous mana growth and token generation. By using your initial pool to activate Doubling Cube, you generate enough surplus mana to pay Urza, Prince of Kroog's steep `{6}` ability—creating a fresh, 1/1 Soldier token copy of the Cube itself. Because Lightning Greaves offers a free `{0}` equip cost, you can immediately slap the boots onto your new token to protect it with shroud before tapping it to double your mana once again. As this cycle repeats, your floating mana explodes exponentially, eventually allowing Urza, Prince of Kroog to flood the board with infinite copies of any artifact you desire while Urza's passive anthem pumps your entire mechanical army.