Creature, The Fractured Shield

Regeneration. Creature, The Fractured Shield regains 10 hit points at the start of their turn if they have at least 1 hit point.

Stored Spell. Creature, The Fractured Shield has one stored charge of a 4th level magic missile spell at their disposal. If a spellcaster wants to store a spell, they must first succeed a Charisma (Persuasion) roll; DC 19 if the spell has not been cast, DC 11 if the spell has already been cast (DC 11 is bypassed if a creature has earned their trust). On a success, a spellcaster can cause Creature, The Fractured Shield to store one spell of 4th level or lower. To do so, the caster must cast the spell on them. The spell has no effect but is stored within Creature, The Fractured Shield. Casting the stored spell requires no components, but Creature, The Fractured Shield will follow commands or cast of their own volition. When the spell is cast or a new spell is stored, any previously stored spell is lost.

Spellcasting. Creature, The Fractured Shield is a 4th-level spellcaster. Their spellcasting ability is Intelligence (spell save DC 11, +3 to hit with spell attacks). Creature has the following spells prepared:
Cantrips (at will): mending, dancing lights, mage hand, minor illusion
1st Level (4 slots): detect magic, unseen servant, floating disk
2nd Level (3 slots): locate object, continual flame

Multiattack. Creature, The Fractured Shield makes two fist attacks.

Fist. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) bludgeoning damage.

Shield. When a creature makes an attack against an allied creature, Creature grants a +2 bonus to the target's AC if Creature is within 5 feet of the target.