Athreos, Shroud-Veiled, Spawning Pit, and Reluctant Role Model

Prerequisites

• Athreos, Shroud-Veiled on the battlefield
• Spawning Pit on the battlefield
• Reluctant Role Model on the battlefield

Steps

1. Activate Spawning Pit by sacrificing the creature with a coin counter on it
2. When the creature dies, Athreos's second ability and Reluctant Role Model's ability trigger
3. Resolve the Reluctant Role Model trigger, putting a coin counter onto itself as well as +1/+1 counters if those were present
4. Resolve the Athreos trigger, returning the creature from your graveyard to the battlefield
5. Resolve the Spawning Pit ability from step 1
6. Activate Spawning Pit by sacrificing Reluctant Role Model
7. When Reluctant Role Model dies, it and Athreos's second ability trigger
8. Resolve the Reluctant Role Model trigger, putting a coin counter and +1/+1 counters onto the other nontoken creature
9. Resolve the Athreos trigger, returning Reluctant Role Model from your graveyard to the battlefield
10. Resolve the Spawning Pit ability from step 6
11. Repeat

Results

• Infinite charge counters on a permanent
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers