5e SRD:Flying Sword
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Small construct, unaligned
Saving Throws Dex +4
Antimagic Susceptibility. The sword is incapacitated while in the area of an antimagic field. If targeted by dispel magic, the sword must succeed on a Constitution saving throw against the caster's spell save DC or fall unconscious for 1 minute.
False Appearance. While the sword remains motionless and isn't flying, it is indistinguishable from a normal sword.
Longsword. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 5 (1d8 + 1) slashing damage.
A flying sword dances through the air, fighting with the confidence of a warrior that can't be injured. Swords are the most common weapons animated with magic.