Eloise, Nephalia Sleuth, Jinnie Fay, Jetmir's Second, and Umbral Collar Zealot

Prerequisites

• Eloise, Nephalia Sleuth on the battlefield
• Jinnie Fay, Jetmir's Second on the battlefield
• Umbral Collar Zealot on the battlefield

Steps

1. Activate Umbral Collar Zealot by sacrificing another creature
2. When the creature dies, Eloise's first ability triggers, and Eloise's second ability triggers if the creature was a token
3. Resolve the first Eloise trigger, creating either a 2/2 Cat or a 3/1 Dog creature token due to Jinnie Fay
4. Resolve the second Eloise trigger, if applicable, causing you to surveil 1
5. Resolve the Umbral Collar Zealot ability, putting a +1/+1 counter on it
6. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite surveil 1