The Ur-ghast is part of the Twilight Forest mod and can be found flying around at the top of the gigantic Dark Towers in the Twilight Forest. And spawns in the nether. It appears as a large, supernatural creature with many large, waving tentacles. The tentacles, unlike other ghasts,are bending. Its sides appear to be covered in blood. It summons caraminite ghastlings which were replaced by vex. The fiery armor are replaced by iron armor but you need to wear full armor to get the effects. *note*(I officially abandon this addon because i am officially working with @jujustyle7 with his mutant addon and ur-ghast will officially appear on the mutant addon)
you can get the addon here↓
www.mediafire.com/download/z57ldzs855rczad