The Sticker | Basilisk is a High Grade sticker. It comes from the Bestiary Capsule.
Sticker
Basilisk (Foil)
Dragon (Foil)
Phoenix Reborn (Foil)
Hippocamp (Holo)
Manticore (Holo)
Pegasus (Holo)
Sphinx (Holo)
Dragon
Hippocamp
Manticore
Pegasus
Phoenix Reborn
Sphinx