Color Identity: G

Initial Card State
- All permanents on the battlefield (Spawning Pit with two or more charge counters on it).
Mana Needed
- ({1} magic symbol)
available.
Steps
- Animate Spawning Pit using Karn.
- 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.
- Activate Spawning Pit's first ability by sacrificing the Spawn, putting two charge counters on it.
- Repeat from step 2.
Results
- Infinite LTB.
- Infinite ETB.
- Infinite sacrifice triggers.
- Infinite death triggers.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).