Spare packs are useful for: Prize support Bonus pack-per-win rewards A raffle at the end of the night A few extra packs for late arrivals Casual pack opening after the draft Check Availability Before Planning the Night MTG booster box stock changes quickly, especially around pre-orders, popular Universes Beyond releases, and strong draft sets
Card Draw One thing we are going to want is more card draw
Sentinel's Eyes What is great about Sentinel's Eyes: Having Vigilance lets your enchanted creature attack and defend at the same time
As a commander, Tamiyo, Inquisitive Student is fine for generating some extra artifact tokens, and if you build around Clue tokens youll have a good amount of them to work with
Hes obviously great with other vampires the cheaper the better to get as many triggers as you can, as well as lord/pump effects, and token doublers like Anointed Procession
Emrakul is used in formats like Modern and Legacy instead, where it can win the game with its gigantic 15/15 body and Annihilator 6