Assassin's Dagger

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

False Appearance. While the dagger remains motionless and isn't flying, it is indistinguishable from a normal dagger.

Sneak Attack. Once per turn, the dagger deals an extra 14 (4d6) damage when it hits a target with a weapon attack and has advantage on the attack roll, or when the target is within 5 feet of an ally of the dagger and the dagger doesn't have disadvantage on the attack roll.

Hide. The dagger may hide as a bonus action.

Dagger. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 5 (1d4 + 3) slashing/piercing damage.