The Screech

The Screech is a large, wyvern-like creature that appears to be made of blue ice. It lives in a Screech den, which is just a large, hollowed-out ice spike, and the only place to find this mob. Only one in fifty ice spikes is a den. The mob would have fifty health points, and have three unique attacks. Attack one: in easy mode only. Slashes you with its claws. Does five hearts of damage. Attack two: in normal mode only. Smashes its tail down on you. Does seven hearts of damage. Attack three: in hard/hardcore mode only. Grabs you and flies into the air, dealing damage as it goes, then drops you. Can kill you. Drops: five-ten blue ice and one hundred xp points. Loot in the den: I'd expect this creature to be a hoarder, so probably shiny things such as emeralds, gold, a few diamonds, and probably more ice.

I hope you like it! (Edit) The Screech is not supposed to be a late-game mob. The only way to find a Screech Den is to stumble across one.