Medium humanoid (any race), any lawful alignment

Armor Class: 11 (14 with mage armor)
Hit Points: 27 (6d8)
Speed: 30 ft.

STR: 8 (-1)
DEX: 12 (+1)
CON: 1 (+0)
INT: 17 (+3)
WIS: 14 (+2)
CHA: 12 (+1)

Saving Throws: Int +5, Wis +4
Skills: Arcana +5, History +5, Insight +4, Investigation +5, Perception +4, Survival +4
Senses: Passive Perception 14
Languages: Any four
Challenge: 3 (700 XP)
Penetrating Missiles: Any use of magic missile or missile salvo ability by a spell guard mage cannot be stopped by a shield spell.

Spellcasting

The spell guard mage is a 6th level spellcaster. Its spellcasting ability is Intelligence (spell save DC13, +5 to hit with spell attacks). The spell guard has the following wizard spells prepared:

Cantrips (at will): acid splash, fire bolt, mage hand, shocking grasp
1st level (4 slots): detect magic false life, magic missile, mage armor
2nd level (3 slots): hold person, misty step, see invisible
3rd level (3 slots): counterspell, dispel magic, fly

Actions

Missile Salvo: One creature of the spell guard mage’s choice, within 120 feet of it and in line of sight, is targeted by a 1st level magic missile spell. The use of this ability does not count against the spell guard mage’s spell slots and cannot be cast at a level higher than 1st without using spell slots to do so. It also, unlike a normally cast magic missile, must target only a single creature with all its darts (see core rulebooks for spell details).
Quarterstaff: Melee Weapon Attack +1 to hit, reach 5ft, one target. Hit 2 (1d6 -1) bludgeoning damage or Hit 3 (1d8 -1) bludgeoning damage if using two hands.

Reactions

Innate Shield: The spell guard mage can innately cast the shield spell, without using any spell slots or the need to prepare the spell.

Spell Guard Mage

Spell guard mages are a specially trained order of wizards that were formed to investigate and deal with magical threats, namely other spell users. Most educational and archival institutions that deal with the craft or the collecting of arcana use the services of members of the Spell Guard Order. The spell guard mages ensure that the magically gifted and the mundane are safeguarded from the darker sides of craft and wizardry.