Ashaya, Soul of the Wild + Blossoming Tortoise + Spawning Pit + Queen Allenal of Ruadach + Tezzeret, Betrayer of Flesh

Ashaya, Soul of the Wild

Blossoming Tortoise

Spawning Pit

Queen Allenal of Ruadach

Tezzeret, Betrayer of Flesh

How it works

1. Animate Spawning Pit using Tezzeret, Betrayer of Flesh.
2. Activate Spawning Pit's second ability by removing two charge counters from it, creating two creature tokens.
3. Activate Spawning Pit's first ability twice by sacrificing the creature tokens, putting two charge counters on it.
4. Repeat from step 2.