Found here: Fantasma Basic

Fantasma Basic is the leftover, original deck that was used by Gambler’s Warehouse to assemble Tomb and Spirit. It’s not an official Fantasma item, consider it a sort of a prototype/production item.

• Almost all white… but printed with invisible ink and neon ink!
• Courts, pips, jokers printed with invisible ink (revealed with a blacklight)
• Index printed with neon ink (visible in normal condition and fluorescent under blacklight)
• Fantasma cards are printed by USPCC
• Same deck included into Spirit Sleeve, but cellowrapped on its own