Greymon (X Antibody)

[Digivolve] [Greymon]: Cost 0 [Your Turn] When this Digimon would digivolve into a card with [Greymon] in its name, reduce the cost by 1 for each of that card's colors.

[All Turns] When effects would delete or return this Digimon with [Greymon] or [Omnimon] in its name to hands or decks, by returning 1 [X Antibody] from its digivolution cards to the bottom of the deck, it isn't deleted or returned to hands or decks.