X Antibody Proto Form

While you have a Digimon, you can 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.

[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.