Sokka, Tenacious Tactician, Trusty Boomerang, Mana Echoes, and Tuktuk Rubblefort

Prerequisites

• Sokka, Tenacious Tactician on the battlefield
• Trusty Boomerang in hand
• Mana Echoes on the battlefield
• Tuktuk Rubblefort on the battlefield
• available

Steps

1. Cast Trusty Boomerang by paying
2. Sokka's second ability and each Ally you control's prowess ability trigger
3. Resolve all prowess triggers, giving each Ally you control +1/+1 until end of turn
4. Resolve the Sokka trigger, creating a 1/1 Ally creature token
5. When the Ally enters, Mana Echoes triggers, adding for each Ally you control
6. Activate Trusty Boomerang's equip ability by paying , attaching it to the Ally token
7. Activate the Ally token by paying and tapping it, tapping a creature a returning Trusty Boomerang from the battlefield to your hand
8. Repeat

Results

• Infinite ETB
• Infinite colorless mana
• Infinite storm count
• Infinite tapped creature tokens
• Infinitely large Allies you control until end of turn