Malcolm, Keen-Eyed Navigator, Havoc Jester, and Imagecrafter

Prerequisites

• Malcolm, Keen-Eyed Navigator on the battlefield
• Havoc Jester on the battlefield
• Imagecrafter on the battlefield
• You control at least one Treasure token
• Imagecrafter does not have summoning sickness

Steps

1. Activate Imagecrafter by tapping it, causing Havoc Jester to become a Pirate until end of turn
2. Activate a Treasure token by tapping and sacrificing it, adding one mana of any color
3. Havoc Jester triggers, dealing 1 damage to any opponent
4. Malcolm triggers, creating a Treasure token
5. Repeat from step 2

Results

• Infinite colored mana
• Infinite damage