Ashaya, Soul of the Wild, Blossoming Tortoise, Spawning Pit, Lae'zel, Vlaakith's Champion, and Katsumasa, the Animator

Prerequisites

• Ashaya, Soul of the Wild on the battlefield
• Blossoming Tortoise on the battlefield
• Spawning Pit on the battlefield
• Lae'zel, Vlaakith's Champion on the battlefield
• Katsumasa, the Animator on the battlefield
• available

Steps

1. Animate Spawning Pit using Katsumasa Activate Spawning Pit's second ability by removing two charge counters from it due to Blossoming Tortoise, creating a 2/2 Spawn artifact creature token
2. Activate Spawning Pit's first ability by sacrificing the Spawn, putting two charge counters on it
3. Repeat from step 2

Results

• Infinite creature LTB
• Infinite creature ETB
• Infinite creature sacrifice triggers
• Infinite death triggers