Screams from Within, and Knight of Doves

Prerequisites

• Screams from Within in hand
• Knight of Doves on the battlefield
• You control a creature with toughness equal to 1
• available

Steps

1. Cast Screams from Within by paying , attaching it to a creature with toughness equal to 1
2. The creature dies as a state-based action due to having zero toughness, triggering Knight of Doves and Screams from Within
3. Resolve the Knight of Doves trigger, creating a 1/1 Bird creature token
4. Resolve the Screams from Within trigger, returning it from your graveyard to the battlefield attached to the Bird
5. Repeat from step 2

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB