Eloise, Nephalia Sleuth + Jinnie Fay, Jetmir's Second + Yahenni, Undying Partisan

Eloise, Nephalia Sleuth

Jinnie Fay, Jetmir's Second

Yahenni, Undying Partisan

How it works

1. Activate Yahenni 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 Yahenni ability.
6. Repeat.