Desription of feature request

this is inspired by suggestions #1388 and #1364. My idea is that after you blow up the wither storm with the formidibomb and he splits into 3 pieces, he also gets a small purple mark above his middle head. This will grow bigger and eventually become the hole needed to enter the bowels.

The wound could have one or more stages between being a purple mark and becoming the giant opening. For example a second stage in which it is a slightly bigger but it does not expose the bowels yet.

This idea tries to make sense of why there's suddenly a giant crater in his head. It simply starts off as a wound from the f-bomb, that crumbles (under the weight of the above mass i guess) until its an actual opening.

it would fit well with the idea of some more scars spread around the WS' body mass, and one of them is slowly being opened by endermen until you can use it. it's just small model and texture changes so it should be cool right?