Chromatic Orrery, Umbral Mantle, and The Blackstaff of Waterdeep

Prerequisites

• Chromatic Orrery on the battlefield
• Umbral Mantle on the battlefield
• The Blackstaff of Waterdeep on the battlefield
• Chromatic Orrery does not have summoning sickness

Steps

1. Activate Chromatic Orrery's first ability by tapping it, adding
2. Activate The Blackstaff of Waterdeep by paying and tapping it, causing Chromatic Orrery to become an artifact creature
3. Activate Umbral Mantle's equip ability by paying , attaching it to Chromatic Orrery
4. Activate Chromatic Orrery by paying and untapping it, giving it +2/+2 until end of turn
5. Activate Chromatic Orrery's first ability by tapping it, adding
6. Repeat from step 4
7. Once you have infinite mana, you may instead use Chromatic Orrery's second ability

Results

• Infinite card draw
• Infinite colored mana
• Infinite colorless mana
• Infinite draw triggers
• Infinitely large Chromatic Orrery until end of turn