The Last Guardian

Effect: [Main] Reveal the top 3 cards of your deck. Add 1 [Cool Boy] and 1 card with the [Royal Knight] or [X Antibody] trait among them to the hand. Return the rest to the bottom of the deck. Then, place this card in the battle area.[All Turns] When any of your Digimon with [Omnimon] in their names would leave the battle area, ＜Delay＞.・1 of those Digimon doesn't leave.

Security Effect: [Security] You may play 1 [Omekamon] or [Cool Boy] from your hand or trash without paying the cost. Then, place this card in the battle area.