Malcolm, Keen-Eyed Navigator, Penregon Strongbull, and Xenograft

Prerequisites

• Malcolm, Keen-Eyed Navigator on the battlefield
• Penregon Strongbull on the battlefield
• Xenograft on the battlefield
• You control at least one artifact
• You have at least three opponents
• "Pirate" chosen with Xenograft
• available

Steps

1. Activate Penregon Strongbull by paying and sacrificing an artifact, dealing 1 damage to each opponent and giving it +1/+1 until end of turn
2. Malcolm triggers for each opponent dealt damage this way, creating that many Treasure tokens
3. Activate a Treasure by tapping and sacrificing it, adding
4. Repeat

Results

• Infinite colored mana
• Infinite damage
• Infinitely large Penregon Strongbull until end of turn
• Infinite Treasure tokens