I am confused... are you the EnderDragon? I don't know... Enderdragons are PREEEETY much the only thing Herobrine fears, and that Herobrine can not destroy, while the enderdragon does not fear Herobrine, and eats him :S...
~ReallyHerobrine :s Founder and C.E.O. of #HerobrineClan
Well firstly it doesn't teleport. It breaks every block in the game instead of just replanting dirt and grass like a REAL enderman. It doesn't react at ALL to you looking at it. It takes no fire or water damage or even potions for that matter! And lastly it can magically phaze through every block in the game.
Oh.. Sounds laggy. I haven't myself yet been in Ender with the dragon alive, just seen screenshots. Doesn't it take water damage? Well... Maybe Notch thought no-one would use it against it. You have solid point.