Homebrew
Antimagic Susceptibility. The steel bird is incapacitated while in the area of an antimagic field. If targeted by dispel magic, the steel bird must succeed on a Constitution saving throw against the caster's spell save DC or fall unconscious for 1 minute. False Appearance. While the steel bird remains motionless, it is indistinguishable from a steel figurine.
Wing Slash. Melee Weapon Attack: +4 to hit, reach 0 ft., one target in the Steel Bird's space. Hit: 1d4+2 slashing damage.