Trazyn the Infinite, Scuttling Sliver, Grim Monolith, and Imagecrafter

Prerequisites

• Trazyn the Infinite on the battlefield
• Scuttling Sliver on the battlefield
• Grim Monolith in the graveyard
• Imagecrafter on the battlefield

Steps

1. Activate Imagecrafter by tapping it, causing Trazyn to become a Sliver until end of turn
2. Activate Trazyn using Grim Monolith's ability by tapping it, adding
3. Activate Trazyn by paying , untapping it
4. Repeat from step 2

Results

• Infinite colorless mana
• Infinite untap of Slivers you control