Book of Stabbing

Magic Weapons. The book of stabbing's weapon attacks are magical. 

Painful Stabs. After hitting a creature with an attack the target must succeed a DC 14 Constitution saving throw or become wounded losing 1d6 health every turn. This condition can stack and every turn 1 stack is removed. If a creature is downed and has this effect instead make death saving throws with disadvantage.

Immutable Form. The book of stabbing is immune to any spell or effect that would alter its form. In addition the dagger it's wielding cannot be disarmed or altered in any way.

Lots-o-stabs. The book of stabbing gains two more multi-stab attacks to it's multiattack every turn. Multiattack is capped at 6 multi-stab attacks.

Multiattack. The book of stabbing makes five attacks, 2 multi-stab attacks, and one single stab attack.

Multi-stab. Melee Weapon Attack: +9 to hit, reach 10 ft., 1 target. Hit: 15 (2d8 + 6) piercing damage.

Single stab. Melee Weapon Attack: +9 to hit, reach 10 ft., 1 target. Hit: 25 (3d12 + 6) piercing damage. 

Teleport. The book of stabbing teleports up to 20 feet to an unoccupied space that it can see.

Parry. The book of stabbing adds 5 to its AC against one melee attack that would hit it. To do so, the book of stabbing must see the attacker and be wielding a melee weapon.

Deflect. The book of stabbing adds 5 to its AC against one range attack that would hit it. To do so, the book of stabbing must see the attacker and be wielding a melee weapon.