Saheeli, the Sun's Brilliance, Mana Echoes, Mycosynth Lattice, and Zealous Conscripts

Prerequisites

• Saheeli, the Sun's Brilliance on the battlefield
• Mana Echoes on the battlefield
• Mycosynth Lattice on the battlefield
• Zealous Conscripts on the battlefield
• Saheeli does not have summoning sickness
• available

Steps

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

Results

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