Nest of Scarabs, and Host of the Hereafter

Prerequisites

• Nest of Scarabs on the battlefield
• Host of the Hereafter on the battlefield

Steps

1. Put a -1/-1 counter on any creature you control with toughness equal to 1
2. The creatue dies as a state-based action due to having zero toughness, triggering Nest of Scarabs and Host of the Hereafter
3. Resolve the Host of the Hereafter trigger, putting a -1/-1 counter on any creature you control with toughness equal to 1
4. Resolve the Nest of Scarabs trigger, creating a 1/1 creature token
5. Repeat from step 2

Results

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