New Boss and Item

The strongest boss that has 400 HP (Double the ender dragon’s health that deals around 18 HP per hit (or 9 hearts of damage). It doesn’t fly but moves around quickly. It can use illusions like the illusioner and is as big as a wither skeleton it will hold a staff, it could look like a wizard not exactly like an illusioner one defeated it could drop 15,000 xp and a staff of healing or something only exclusively obtain by that boss. And it could heal you entirely but it needs to be filled with potions of healing. (I or II) and could drop diamonds and/or emeralds...