Animated Armor

Animated Armor CR: 9

Medium ,

Armor Class: 22

Hit Points: 160

Speed: 40 ft

STR

28 +9

DEX

18 +4

CON

24 +7

INT

12 +1

WIS

16 +3

CHA

12 +1

Saving Throws: STR +13, CON +11

Skills: Athletics +13, perception +7

Damage Vulnerabilities: acid

Damage Resistances: bludgeoning, slashing, piercing

Senses: Blindsight up to 120 feet

Challenge Rating: 9

Proficiency Bonus: +4

+13 to hit, 21 spell save DC.
The animated armor uses its spell save DC for non spell casting abilities.

Parry - The animated armor's AC increases to 24 when it is hit with a melee attack from the front or sides. If an attack that otherwise would have hit instead misses due to the parry ability, the animated armor can use its reaction to make a nodachi attack against the attacker.
Indomitable (3/day) - If the animated armor fails a save, it can roll again, but must take the new roll

Actions

Multiattack - The Animated armor makes three attacks with its nodachi or spin attack
Nodachi - +13 to hit, 4D10+9 slashing, reach
Spin Attack - DC 21 dex save, 3D10 slashing, 10 foot radius

Bonus Actions

Disarm - If the animated armor successfully lands an attack, it can choose to use its bonus action to impose a contesting strength check. If it succeeds, the targets object its holding drops to its feet
Second Wind - The animated armor can regain 1d10+9 health

Reactions

Guardian - If an attack is made against an ally within 10 feet of the animated armor, it can add +2 to that ally's armor class

A hollow set of samurai armor that has been imbued with a soul and become a yokai.