Greymon (X Antibody)

[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 this Digimon with [Greymon] or [Omnimon] in its name would be deleted or returned to your hand or deck by an effect, by placing 1 [X Antibody] from this Digimon's digivolution cards at the bottom of its owner's deck, prevent this Digimon from leaving play.

[Alt]
[Digivolve] [Greymon]: Cost 0