White Rose Cloister

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 type of card (Monster, Spell, or Trap); reveal the top card of your Deck, and if it was the declared type, for the rest of this turn, Level 7 or higher Synchro Monsters you control gain 1000 ATK (even if this card leaves the field).