Blue Elf

Fey Ancestry: A blue elf has advantage on saving throws against being charmed, and magic can't put him to sleep.

Spellcasting. The blue elf is a 10th-level spellcaster. Its spellcasting ability is Charisma (spell save DC 16, +8 to hit with spell attacks). The blue elf has following sorcerer spells prepared:
Cantrips (at will): blade ward, firebolt, message, minor illusion
1st level (4 slots): charm person, fog cloud, magic missile, mage armor

2nd level (3 slots): hold person, levitate, misty step

3rd level (3 slots): blink, fireball, fly

4th level (3 slots): confusion, dimension door, ice storm

5th level (2 slots): cone of cold, dominate person 

Quarterstaff Melee Attack. Melee Weapon Attack: +3 to hit, reach 5 ft., 1 target. Hit: 3 (1d6) [bludgeoning] damage. Deals 4 (1d8) damage if used two-handed. 

Reflect Spell (5/day). Magic is attracted to the blue elf as if he were a magnet. If a spell is cast targeting the blue elf or another creature within 15 feet, the blue elf can roll a Charisma saving throw against the spellcasters spell save DC. If the blue elf succeeds, he absorbs the magic taking no damage and rebounds the spell back on the spellcaster, including all additional effects and modifiers tied to the spell using the blue elf's spell save DC and spell attack bonus. This works for spells of all levels and does not consume a spell slot. On a failed save, the spell continues as intended, but deals only half damage.