Animated Mirror

Antimagic Susceptibility. The mirror is incapacitated while in the area of an antimagic field. If targeted by dispel magic, the mirror must succeed on a constitution saving throw against the caster’s spell save DC, or become unconscious for 1 minute.

Arcane Reflection. Whenever a spell attack is made against the front half of the mirror, the attack is reflected back at the caster. A new attack roll is made against the caster, using the caster’s spellcasting modifier. On a hit, the damage dealt is also determined using the caster’s modifier.

False Appearance. While the mirror remains motionless, it is indistinguishable from a normal mirror. 

Magic Resistance. The mirror has advantage on saving throws against spells and other magical effects.

Multiattack. The mirror makes two attacks with its pseudopods. It can target one or two creatures within range with these attacks. 

Pseudopod. Melee Weapon Attack: +5 to hit, reach 5ft, one target. Hit: 10 (2d6 +3) bludgeoning damage.