Malcolm, Keen-Eyed Navigator + Reckless Fireweaver + Maskwood Nexus

Malcolm, Keen-Eyed Navigator
Reckless Fireweaver
Maskwood Nexus

Requires
All permanents on the battlefield. You have a way to cause an artifact to enter the battlefield under your control.
Steps
  1. Cause an artifact to enter the battlefield under your control
  2. Reckless Fireweaver triggers, dealing 1 damage to each opponent
  3. Malcolm triggers, creating a Treasure token for each opponent dealt damage this way
  4. The Treasures enter the battlefield, triggering Reckless Fireweaver that many times
  5. Resolve the first Reckless Fireweaver trigger, dealing 1 damage to each opponent
  6. Repeat from step 3
Results
Infinite damage. Infinite Treasure tokens. Infinite colored mana.