[ Dragon / Effect ]If you control no monsters, or all monsters you control mention "Endless Darkness": You can Special Summon this card from your hand. If this card is Normal or Special Summoned: You can add 1 monster that mentions "Endless Darkness" from your Deck to your hand, except a Level 6 monster, or if you have a banished "Blue-Eyes" monster, you can add 2 such monsters with different Attributes from each other instead. You can only use each effect of "Krystal Cloud Dragon" once per turn. ATK/ 2500 DEF/ 1000