Hapatra, Vizier of Poisons, and Blowfly Infestation

Prerequisites

• Hapatra, Vizier of Poisons on the battlefield
• Blowfly Infestation on the battlefield
• You control at least two other creatures with toughness equal to one
• You have a way to put a -1/-1 counter on a creature

Steps

1. Put a -1/-1 counter on any creature you control with toughness equal to one
2. The creatue dies as a state-based action due to having zero toughness
3. Hapatra and Blowfly Infestation trigger
4. Resolve the Hapatra trigger, creating a 1/1 Snake creature token
5. Resolve the Blowfly Infestation trigger, putting a -1/-1 counter on any creature you control with toughness equal to one
6. Repeat from step 2

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB