mtg ravnica remastered collector booster box Magic: The Gathering Draft with a combination of 4–5 cards of rarity Rare or higher MTG Ravnica Remastered Collector Booster

Harpie's Feather Duster

All the Extra Deck monsters can "steal" or gain control of the opponent's monsters with different triggers and conditions, and both "Sheridan" and "Voivode" share a similar alternate summon condition of treating monsters owned by the opponent as materials of the appropriate level for their Xyz summon

EDIT: I rewatched the video I linked above, and he does have some cards similar to yours at 15:07 - 15:20 (although his has two eyes, both at the top and bottom)

You can only Special Summon "Nightmare Apprentice" once per turn this way

The sheer card advantage Tiamat creates on ETB is well worth it on its own, but its also one of many Food Chain combo enablers that you can put in the command zone