Blood Knight

You cut yourself, dealing 1d6 slashing damage to yourself. A knight made of blood is then summoned. It follows your commands to the best of its ability, and can move through space as narrow as 1 inch without squeezing. Its movement speed is 30 ft., and can only use melee attacks. If the knight is more than 60 ft. away from you, it dies and your concentration is broken.

Attacks:

Unarmed Strike. Melee Weapon Attack: +0 to hit, reach 5 ft., one target. Hit: 1d4 bludgeoning damage.

Sword. Melee Weapon Attack: +2 to hit, reach 5 ft., one target. Hit: 1d8 slashing damage.