X Antibody Proto Form (Tamer's Selection Box Ver. X Antibody) #EX5-070

While you have a Digimon, you may ignore this card's color requirements.
[Security] Add this card to the hand.
[Main] 1 of your Digimon without [X Antibody] in its digivolution cards may digivolve into a Digimon card with the [X Antibody] trait in your hand with the digivolution cost reduced by 1. If it did, place this card as its bottom digivolution card.

[Rule] Name: Also treated as [X Antibody].

[All Turns] When this Digimon would leave the battle area other than by one of your effects, from this Digimon's digivolution cards, return 1 Digimon card to the hand and place 1 [X Antibody] on top of your security stack.