Malcolm, Keen-Eyed Navigator, Unnatural Selection, and Ingenious Artillerist

Prerequisites

• Malcolm, Keen-Eyed Navigator on the battlefield
• Unnatural Selection on the battlefield
• Ingenious Artillerist on the battlefield
• available

Steps

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

Results

• Infinite colored mana
• Infinite damage
• Infinite Treasure tokens