偽臣の書
Spellbook of Fake Authority is a Weiß Schwarz card from 劇場版「Fate/stay night [Heaven’s Feel]」 FS/S64-051. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
Search your deck for up to 2 "Mysterious Knight, Rider", put them on separate positions on your stage, and shuffle your deck. Put this card into your memory.