Mishra, Eminent One + Urza, Lord High Artificer + Worldwalker Helm + Concordant Crossroads

Mishra, Eminent One

Urza, Lord High Artificer

Worldwalker Helm

Concordant Crossroads

How it works

1. At the beginning of your combat phase, Mishra triggers, creating a token copy of Worldwalker Helm that is a 4/4 Construct artifact creature with haste named Mishra's Warform, and a Map token.
2. Activate Urza's first ability by tapping a Map, adding .
3. Activate Mishra's Warform by paying 1 and tapping it, creating a token copy of it and a Map token for each Mishra's Warform and/or Worldwalker Helm you control.
4. Activate Urza's first ability twice by tapping two Maps, adding .
5. Repeat from step 3.

This brilliant sequence turns your artifact tokens into an endless engine of creation, fueled by Mishra, Eminent One and Worldwalker Helm. At the start of combat, Mishra breathes life into the Helm as a hasty Mishra's Warform while the Helm's replacement effect generously tacks on an extra Map token. From there, you tap those very Maps for blue mana using Urza, Lord High Artificer's tap ability, which in turn provides the exact blue mana needed to activate the copied Worldwalker Helm's ability. Thanks to Concordant Crossroads giving everything haste, your newly minted token copies can immediately tap to feed the loop, compounding exponentially into infinite artifact tokens, mana, and eventually casting your entire library.