This is something I created for a month long event. Place the crystal on any mobs. When a player gets a crystal he can either save or double click it and summon the boss where he is at. The boss has a chance to drop a custom Mask and another crystal for a weaker tamable dragon that looks like...
Was browsing through the forums and I found this posted about Crystal Balls: https://www.servuo.com/threads/a-crystal-ball-why-are-these-still-spawning-in-dungeon-chests-they-were-a-runuo-custom.7515/#post-47727
It got me intrigued so I did some digging and discovered the follow:
Crystal Balls...