Happy Christmas Puck (RZ/S116-E037) Re:ZERO -Starting Life in Another World- Vol.3 Card details

[AUTO] When this card is placed on the stage from your hand, perform the following action 2 times. "You may choose 1 of your opponent's level 1 or higher characters. If you do, your opponent chooses 1 level X or lower character in their waiting room, and exchanges them. X is equal to the level of the character you chose -1."
[AUTO] [(1) Put 1 card from your hand into your waiting room] When this card attacks, you may pay the cost. If you do, this card gets +2000 power and the following ability until end of turn. "[AUTO] When this card's battle opponent becomes [REVERSE], you may deal 1 damage to your opponent." (Damage may be canceled)