Demon King Jaldabaoth (OVL/S62-E008 R) Nazarick: Tomb of the Undead Card details

[AUTO] When this card is placed on the stage from your hand, put the top card of your deck into your waiting room, choose up to 1 of your opponent's level X or lower characters, and put it into his or her waiting room. X is equal to the level of the revealed card. (Climax are regarded as level 0)
[AUTO] [CXCOMBO] [(1)] When this card attacks, if "Operation Gehenna" is in your climax area, you may pay the cost. If you do, choose up to 1 character in your waiting room, return it to your hand, and this card gets the following ability until the end of turn. "[AUTO] This ability activates up to 1 time per turn. When damage dealt by this card is canceled, you may deal 1 damage to your opponent." (Damage may be canceled)