Saheeli, the Sun's Brilliance, Mana Echoes, Chromatic Orrery, and Deceiver Exarch

Prerequisites

• Saheeli, the Sun's Brilliance on the battlefield
• Mana Echoes on the battlefield
• Chromatic Orrery on the battlefield
• Deceiver Exarch on the battlefield
• Saheeli does not have summoning sickness
• available

Steps

1. Activate Saheeli by paying and tapping it, creating a token copy of Deceiver Exarch with haste
2. When the token Deceiver Exarch enters the battlefield, it and Mana Echoes trigger
3. Resolve the Deceiver Exarch trigger, untapping Saheeli
4. Resolve the Mana Echoes trigger, adding for each creature you control that shares a creature type with Deceiver Exarch
5. Repeat

Results

• Infinite ETB
• Infinite colored mana
• Infinite colorless mana
• Infinite creature tokens with haste