If this card is Normal or Special Summoned: You can activate this effect; during the End Phase of this turn, add 1 Level 5 or higher WATER monster from your Deck to your hand. If you control a Level 5 or higher WATER monster and this card is in your GY: You can Special Summon this card, but banish it when it leaves the field. You can only use each effect of "Crystal Girl" once per turn.