A Dragon Skull and Dragon Bones are always dropped. The s are very strict on that matter and breaking these phrases my end in all your winnings turning into void. https://Products-dd.com/%E0%B9%81%E0%B8%AD%E0%B8%A3%E0%B9%8C/%E0%B9%81%E0%B8%AD%E0%B8%A3%E0%B9%8C-hisense-%E0%B8%94%E0%B8%B5%E0%B9%84%E0%B8%AB%E0%B8%A1-%E0%B8%A3%E0%B8%B5%E0%B8%A7%E0%B8%B4%E0%B8%A7%E0%B8%82%E0%B9%89%E0%B8%AD%E0%B8%94%E0%B8%B5-%E0%B8%82/