Blood Knight

This is my first subclass i have made so i would like some feedback (no matter how negative you can make it) Thanks all

A Blood Knight has the power to take ones life force and make it their own.  They have ancient rites to certain elemental damage of a blood knights choice.  Blood Knights are very good at counter striking their foes

Vampiric Touch

At level 7 you gain access to Vampiric Touch. The touch of your shadow-wreathed hand can siphon life force from others to heal your wounds. Make a melee spell attack against a creature within your reach. On a hit, the target takes 3d6 necrotic damage, and you regain hit points equal to half the amount of necrotic damage dealt. Until the spell ends, you can make the attack again on each of your turns as an action without expending any spell slots

Ancient Blood Rune

At level 10 you have the option to choose an ancient blood rune that will permanently be imbued with Fire, Ice, or Lightning dealing 2d8 damage of respective element. Upon a critical of 19 or 20 you can add 1d4 of the same damage

Fire Rune

At level 10 you have an ancient blood rune that will permanently be imbued with fire dealing 2d8 fire damage of respective element. Upon a critical of 19 or 20 you can add 1d4 of the same damage

Ice Rune

At level 10 you have an ancient blood rune that will permanently be imbued with Ice dealing 2d8 cold damage of respective element. Upon a critical of 19 or 20 you can add 1d4 of the same damage

Lightning Rune

At level 10 you have an ancient blood rune that will permanently be imbued with Lightning dealing 2d8 lightning damage of respective element. Upon a critical of 19 or 20 you can add 1d4 of the same damage

Eyes of Many

at level 15 you gain the ability's of True Sight, and Blind Sight

Blood Weapon

At level 18 you can use your own blood to make your weapon of choice to deal 1d12 of necrotic damage, however you take 2d6 psychic damage from making this blood weapon. You still get your Ancient Blood Rune damage with Blood Weapon

Counter Strike

At level 3 you can Counter Strike. When an enemy rolls against your Armor Class (AC) and matches or misses you can take one action to strike back with your weapon