Antimagic Susceptibility. The knives are incapacitated while in the area of an antimagic field. If targeted by dispel magic, the knives must succeed on a Constitution saving throw against the caster's spell save DC or fall unconscious for 1 minute.
False Appearance. While the knives remains motionless aren't flying, they are indistinguishable from normal knives.
Swarm. The swarm can occupy another creature’s space and vice versa, and the swarm can move through any opening large enough for a Tiny knife. The swarm can’t regain hit points or gain temporary hit points.
Knives.Melee Weapon Attack: +3 to hit, reach 0 ft., one target in the swarm’s space. Hit: 8 (5d4) piercing damage, or 5 (2d4) piercing damage if the swarm has half of its hit points or fewer.