Nivix Guildmage + Unexpected Windfall + Agatha of the Vile Cauldron

Nivix Guildmage

Unexpected Windfall

Agatha of the Vile Cauldron

How it works

1. Cast Unexpected Windfall by paying 2 and discarding a card.
2. Holding priority, activate Nivix Guildmage's second ability by paying , copying Unexpected Windfall.
3. Resolve the copy of Unexpected Windfall, creating two Treasure artifact tokens and causing you to draw two cards.
4. Activate both Treasures by tapping and sacrificing them, adding .
5. Repeat from step 2.

This engine turns a single copy of Unexpected Windfall into a self-sustaining loop by leveraging Nivix Guildmage to continually replicate the spell, using the generated Treasure tokens to pay for the copying process. Agatha of the Vile Cauldron is the vital enabler here, as her passive ability reduces the hefty mana cost of the Guildmage's copy ability down to a manageable size, ensuring the Treasures produce enough mana to sustain the loop. As you repeat this process, you draw your entire deck and trigger any magecraft effects infinitely, leaving you poised to easily close out the game in formats like commander, legacy, modern, oathbreaker, pioneer, and vintage.