exiled ender dragon

So in the end I was thinking at the beginning of the end there were two  ender dragons. But to no ones surprise they were all evil. So the main ender dragon (the one that rules the end)  used her power to exile the other ender dragon out. So now there is one  weaker "ender dragons" called an exiled dragon . So the way the player finds the exiled dragon is when they kill the warden. And basically the warden instead of the warden having the classic death animations he  transforms into stone and then a portal opens up on where his chest would be. Which the player can enter the exiled dimension which includes the exiled dragon. which in basics is the ender dragon but with the following changes: Firstly the exiled dragons breathes acid breath that does half damage of the ender dragons breath. Secondly it also has a dive ability were it swoops in at the player and breaks the ground beneath them also knocking the player back, And finally at 25% health he rip a fabric of reality which will send out 3 different clumps of blocks that will smash on the ground. And also after every three attacks he flys to the middle of the exiled dimension for the player to attack.