This would be a very rare mob that would appear randomly in any dimension. If you damage it, it will shoot a ray at you that will damage you. The more you hit it, the faster it will change color. When it reaches its maximum, it will contract and explode.
If you drop items on it, you can improve your relationship with it. You'll know you're doing well because small orbs of light will hover around it. There would be a maximum of eight.
These could bless/transform your items if you drop them under it by shooting a ray at them. The blessing would depend on the item. If it is a weapon, tool or armor, this one would enchant it with a unique enchantment that can only be obtained from this
If it is a torch: this would be transformed into a block with a similar appearance to pe only in miniature. A mini-PE, this would be a decorative block that emits light.
If it is a sword: it would receive the "Astral Ray" enchantment. This would throw the PE's ray, this one would bounce off the mobs you hit with the sword.
If you give it a tool: this would receive the "Instant Break" enchantment, which would make the tool break blocks instantly, but it would break faster.
If it's an armor: this would receive the "Paralyzing Thorns" enchantment. This would paralyze mobs that hit you when you carry it
If it is a bottle: this would store the blessing, being able to imbue the torch and books in an anvil, if you take it you will receive "the blessing of Pe" this would give you creative flight for a minute, if you die with this effect you invoke the explosion of Pe in the place where you died
If it is a book: it would receive one of the 3 enchantments mentioned above plus other random enchantments