Animated Blade Master

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

False Appearance. While the armor remains motionless, it is indistinguishable from a normal suit of armor.

Control Weapon Constructs. The Blade Master can control up to 5 Flying Swords, and can attune to up to 10 weapons total.  Each of the 5 Flying Swords attack on it's initiative turn, and have stats typical of Flying Swords.

Multiattack. The armor makes two melee attacks.  Three if it is wielding dual Longswords and uses a bonus action to do so.

Longsword. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 1d6 + 3 slashing damage.

Greatsword. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 2d6 + 3 slashing damage.

Halbert. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 1d10 + 3 slashing damage.

Shield Bash. Special Attack: reach 5 ft., one target.  Target must make a Constitution Saving Throw DC 13.  On a fail, the target is stunned until the end of their next turn.

Whirlwind. Special Attack: reach depends on current weapon (5 or 10 ft.).  All creatures within the range must make a Dexterity Saving Throw DC 13.  On a fail, the creatures take the damage of a Hit by the currently equipped weapon.  On a success they take no damage.

Requip. (Bonus Action)  The Blade Master may switch out the weapons in either or both hands with any other items attuned to it.  Common options are Shield's, Longswords, Greatswords, and Halberd.

Storm of Blades.  When the Blade Masters total HP falls below 20, all of the remaining Flying Swords surround him in a deadly cyclone of blades.  All creatures within 5 ft. of the Blade master must make a Dexterity Saving Throw DC 13.  On a fail, the creatures take 1d8+1 damage from each sword. They take half damage on a success.  The Storm of Blades remains for 1 minute, or until the Blade Master is destroyed.  While in effect, the ranged weapon attacks against the Blade Master are made at disadvantage, as are all attacks against the Flying Swords.  While in effect, the Blade Master cannot make any attack actions nor wield any weapons or a shield.  If the Blade Master is destroyed, the Flying Swords return to fighting normally until destroyed.