Trazyn the Infinite, Chromatic Orrery, and Umbral Mantle

Prerequisites

• Trazyn the Infinite on the battlefield
• Chromatic Orrery in the graveyard
• Umbral Mantle on the battlefield

Steps

1. Activate Trazyn using Chromatic Orrery's ability by tapping it, adding
2. Activate Trazyn by paying and untapping it, giving it +2/+2 until end of turn
3. Repeat

Results

• Infinite colored mana
• Infinite colorless mana
• Infinite card draw
• Infinite draw triggers
• Infinite untap of creatures you control
• Infinitely large creature until end of turn