Magda, Brazen Outlaw, Ith, High Arcanist, and Maskwood Nexus

Prerequisites

• Magda, Brazen Outlaw on the battlefield
• Ith, High Arcanist on the battlefield
• Maskwood Nexus on the battlefield
• Ith does not have summoning sickness

Steps

1. Attack with Ith
2. While Ith is still attacking, activate Ith by tapping itself, targeting itself
3. Magda triggers, creating a creature token
4. Resolve Ith's ability, untapping itself
5. Repeat from step 2

Results

• Infinite colored mana
• Infinite Treasure tokens
• Put any number of artifacts and creatures from your library onto the battlefield
• Put all Dragon and artifact cards from your library onto the battlefield