Illumination. Trenzia sheds either dim light in a 15-foot radius, or bright light in a 15-foot radius and dim light for an additional 15 feet. It can switch between the options as an action.
Magic Resistance. Trenzia has advantage on saving throws against spells and other magical effects.
Rejuvenation. If Trenzia is destroyed, it regains all its hit points in 1 hour unless holy water is sprinkled on its remains or a dispel magic or remove curse spell is cast on them.
Spellcasting. Trenzia is a 5th-level spellcaster. Her spellcasting ability is Intelligence (spell save DC 13, +5 to hit with spell attacks). She requires no somatic or material components to cast its spells. Trenzia has the following wizard spells prepared:
Cantrips (at will): mage hand
1st level (3 slots): magic missile, shield
2nd level (2 slots): blur, flaming sphere
3rd level (1 slot): lightning bolt
Multiattack. Trenzia uses Lightning Ray twice.
Fire Ray. Ranged Spell Attack: +5 to hit, range 30 ft., one target. Hit:10 (3d6) lightning damage.
Blazing green flames and mad, echoing laughter surround an undead flameskull. This disembodied skull blasts foes with fiery rays from its eyes and dreadful spells called up from the dark recesses of its memory.