Splendor of the White Crow Witch

You can activate 1 of these effects;
● Special Summon 1 "White Crow" monster from your hand or GY.
● Fusion Summon 1 "Diabell" Fusion Monster from your Extra Deck, using up to 1 "White Crow" monster each from your hand, Extra Deck, and/or field.
● If you control a "Diabell" monster: Target 1 face-up card on the field; negate its effects until the end of this turn.
You can only use this effect of "Splendor of the White Crow Witch" once per turn.