Kambal, Profiteering Mayor, Trudge Garden, and Mana Echoes

Prerequisites

• Kambal, Profiteering Mayor on the battlefield
• Trudge Garden on the battlefield
• Mana Echoes on the battlefield
• You have a way to cause a token to enter the battlefield under your control
• plus an additional if there are no other Fungi or Beasts on the battlefield available

Steps

1. Cause a token to enter the battlefield under your control
2. Kambal's second ability triggers, causing each opponent to lose 1 life and you to gain 1 life
3. Trudge Garden triggers, causing you to pay to create a 4/4 Fungus Beast creature token
4. Kambal's second ability and Mana Echoes trigger
5. Resolve the Mana Echoes trigger, adding for each Fungus and Beast on the battlefield
6. Resolve the Kambal trigger, causing each opponent to lose 1 life and you to gain 1 life
7. Repeat from step 3

Results

• Infinite colorless mana
• Infinite creature tokens
• Infinite ETB
• Infinite lifegain
• Infinite lifegain triggers
• Infinite lifeloss