Bayerock Dragon

If a monster(s) you control or in your hand is destroyed by battle or card effect: You can Special Summon this card from your hand. If this card in its owner's possession is destroyed by an opponent's card: You can target 1 other Dinosaur monster and/or 1 Rock monster in your GY; Special Summon them. You can only use each effect of "Bayerock Dragon" once per turn.