Improvised Arsenal, Mana Echoes, Displaced Dinosaurs, and Gemstone Array

Prerequisites

• Improvised Arsenal on the battlefield
• Mana Echoes on the battlefield
• Displaced Dinosaurs on the battlefield
• Gemstone Array on the battlefield
• at most available

Steps

1. Activate Improvised Arsenal by paying , creating a token copy of it
2. It will enter as a 7/7 Dinosaur due to Displaced Dinosaurs
3. When the Improvised Arsenal token enters, Mana Echoes triggers, adding for each Dinosaur you control
4. If needed, activate Gemstone Array's first ability by paying , putting a charge counter on it
5. Then, activate Gemstone Array's second ability by removing a charge counter from it, adding
6. Repeat

Results

• Infinite ETB
• Infinite charge counters on a permanent
• Infinite colored mana
• Infinite colorless mana
• Infinite creature tokens