Urza, Lord High Artificer, Magda, Brazen Outlaw, Mycosynth Lattice, and Pemmin's Aura

Prerequisites

• Urza, Lord High Artificer on the battlefield
• Magda, Brazen Outlaw on the battlefield
• Mycosynth Lattice on the battlefield
• Pemmin's Aura on the battlefield
• Pemmin's Aura attached to Magda

Steps

1. Activate Urza's first ability by tapping Magda, adding
2. Magda triggers, creating a Treasure artifact token
3. Activate Pemmin's Aura's first ability by paying , untapping Magda
4. Repeat
5. Once you have infinite Treasure tokens and colored mana, you may use it to activate Urza's second ability

Results

• Cast all cards in your library without paying their mana costs
• Infinite colored mana
• Infinite Treasure tokens
• Near-infinite storm count
• Put all Dragon and artifact cards from your library onto the battlefield
• Exile your library