Advanced format ruling
Instant Neo Space
Card effect (current official text)Equip only to a Fusion Monster that lists "Elemental HERO Neos" as material. It does not have to activate its effect during the End Phase to shuffle itself into the Extra Deck. If the equipped monster leaves the field: You can Special Summon 1 "Elemental HERO Neos" from your hand, Deck, or GY.
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.