Urza, Prince of Kroog + Reset + Liquimetal Torque + Mnemonic Wall

Urza, Prince of Kroog

Reset

Liquimetal Torque

Mnemonic Wall

How it works

1. During an opponent's turn, after their upkeep step, activate Liquimetal Torque's second ability by tapping it, causing Mnemonic Wall to become an artifact until end of turn.
2. Activate all mana-producing lands you control by tapping them, adding at least 6.
3. Cast Reset by paying , untapping all lands you control.
4. Activate Urza by paying 6, creating a token copy of Mnemonic Wall that is a 1/1 Soldier in addition to its other types.
5. When the Mnemonic Wall token enters the battlefield, it triggers, returning Reset to your hand from your graveyard.
6. Repeat from step 2.
7. If lands you control can tap to proudce at least 7, this combo nets infinite mana, which can be used to activate Urza's ability infinitely and/or cast Reset choosing its other modes.

This ingenious engine leverages Liquimetal Torque to turn Mnemonic Wall into an artifact, perfectly setting it up as a copy target for Urza, Prince of Kroog. Each time Urza's massive activation fee is paid, a fresh Mnemonic Wall token enters the battlefield to fish Reset right back out of your graveyard. As long as your lands produce enough mana to fund the cycle, Reset untaps them all to restart the loop, ultimately letting you flood the board with an unstoppable army of buffed artifact creature tokens.