Id want to be playing reasonable density of creatures that either have ETBs and can be sacrificed for value, or do something when they die
Bonny Pall, Clearcutter A busted Simic legend that produces an incredible amount of power, card advantage, and ramp
One Reddit commenter suggested that the red rose in the window glass might be a reference to the card art of Blood Moon it's possible
Crystal Fragments // Summon: Alexander Source Slash of Light Source | Magitek Armor Source Aettir and Priwen Source | Omega the Heartless Source Lion Heart Source: Wizards Email | Snow Villiers Source Locke Cole Source | Clash of the Eikons Source Garnet, Princess of Alexandria Source | Qiqirn Merchant Source Gongaga, Reactor Town Source | Guadosalam, Farplane Gateway Source Gohn, Town of Ruin Source | Baron, Airship Kingdom Source Sharlayan, Nation of the Scholars Source | Vector, Imperial Capital Source Treno, Dark City Source | Windurst, Federation Center Source | Insomnia, Crown City Source Through the Ages Magic: The Gathering FINAL FANTASY releases June 13
If another attack trigger (such as from the mobilize ability) puts creatures onto the battlefield attacking, you can choose to order the triggered abilities so that those creatures enter before Stormbeacon Blade's ability resolves
The key here is timing: drop Vault early, then cash in expendable artifacts to reload when you need to push ahead