Soul of Zendikar, Mana Echoes, and Chromatic Orrery

Prerequisites

• Soul of Zendikar on the battlefield
• Mana Echoes on the battlefield
• Chromatic Orrery on the battlefield
• You control at least four Beasts

Steps

1. Activate Chromatic Orrery's first ability by tapping it, adding
2. Activate Soul of Zendikar's first ability by paying , creating a 3/3 Beast creature token
3. The Beast enters the battlefield, triggering Mana Echoes, adding at least
4. Repeat from step 2

Results

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