Volo's Guide to Monsters (5e)
Spellcasting. The abjurer is a 13th-level spellcaster. Its spellcasting ability is Intelligence (spell save DC 16, +8 to hit with spell attacks). The abjurer has the following wizard spells prepared:
*Abjuration spell of 1st level or higher
Arcane Ward. The abjurer has a magical ward that has 30 hit points. Whenever the abjurer takes damage, the ward takes the damage instead. If the ward is reduced to 0 hit points, the abjurer takes any remaining damage. When the abjurer casts an abjuration spell of 1st level or higher, the ward regains a number of hit points equal to twice the level of the spell.
Quarterstaff. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 2 (1d6 - 1) bludgeoning damage, or 3 (1d8 - 1) bludgeoning damage if used with two hands.
Any Climate; Any Terrain (usually Urban)