Animated Shield (5e Creature)
From D&D Wiki
Small construct, unaligned
Saving Throws Dex +4
Animagic Susceptibility. The shield is incapacitated while in the area of an antimagic field. If targeted by dispel magic, the shield must succeed on a Constitution saving throw against the caster's spell save DC or fall unconscious for 1 minute.
False Appearance. While the shield remains motionless and isn't flying, it is indistinguishable from a normal shield.
Spin. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d6 + 2) bludgeoning damage.
The animated shield is typically a shield that tends to stick around animated armors and flying swords, trying to look as inconspicuous as possible. It rarely works. If that fails, it will attack without mercy as all it wants is to stay nearly invisible. If an adventurer picks up an animated shield, they can expect a few days of good use before the shield realizes what's happening and leaves them.