Malcolm, Keen-Eyed Navigator, Unnatural Selection, and Weftstalker Ardent

Prerequisites

• Malcolm, Keen-Eyed Navigator on the battlefield
• Unnatural Selection on the battlefield
• Weftstalker Ardent on the battlefield
• available

Steps

1. Activate Unnatural Selection by paying , giving Weftstalker Ardent the Pirate creature type until end of turn
2. Cause an artifact to enter the battlefield under your control
3. Weftstalker Ardent triggers, dealing 1 damage to each opponent
4. Malcolm triggers, as Weftstalker Ardent is a Pirate due to Unnatural Selection, creating a Treasure token for each opponent dealt damage this way
5. When the Treasure(s) enter, Weftstalker Ardent triggers that many times
6. Resolve the first Weftstalker Ardent trigger, dealing 1 damage to each opponent
7. Repeat from step 4

Results

• Infinite colored mana
• Infinite damage
• Infinite Treasure tokens