If you control no monsters: You can Special Summon 1 "Rose Dragon" monster or 1 Plant monster from your hand. You can only use this effect of "White Rose Cloister" once per turn. During your Draw Phase, before you draw: You can declare 1 card type (Monster, Spell, or Trap); reveal the top card of your Deck, and if it is the declared card type, apply this effect for the rest of this turn (even if this card leaves the field).
• Level 7 or higher Synchro Monsters you control gain 1000 ATK.