Hapatra, Vizier of Poisons, and Resourceful Defense

Prerequisites

• Hapatra, Vizier of Poisons on the battlefield
• Resourceful Defense 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 Hapatra and Resourceful Defense
3. Resolve the Resourceful Defense trigger, putting a -1/-1 counter on any creature you control with toughness equal to 1
4. Resolve the Hapatra trigger, creating a 1/1 creature token
5. Repeat from step 2

Results

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