Advanced Crystal Beast Pearl Goat

(This card is also treated as "Crystal Beast Pearl Goat".)
If there is no face-up "Advanced Dark" on the field, destroy this card. When this card is sent to the Graveyard: You can place this card face-up as a Continuous Spell Card instead. Once per turn: You can Special Summon 1 "Advanced Crystal Beast" monster from your Spell/Trap Card Zone whose monster slot which is in the same column as that card is unoccupied.