You no longer need to eat, drink, or breathe. Your heart no longer beats, and your creature type is now additionally “undead”

You have a climbing speed equal to your walking speed. In addition, at 3rd level, you can move up, down, and across vertical surfaces and upside down along ceilings, while leaving your hands free.

As an action, you can summon a Chiropteran claw out of your right hand, which grows to roughly 1.5x the normal size of your hand. It is considered magical. It can be used to melee attack (using spell attack modifier) that deals 1d8 slashing and 1d4 necrotic damage (lvl 10 - 1d10/1d6 lvl 14 - 2d6/1d8  level 18 - 2d8/1d10). You are proficient with your claw. After you cast a spell (but not a cantrip!), you can summon the claw as a bonus action instead. As long as the claw is out you can attack with it as a bonus action.In addition you can use the claw to make attacks of opportunity when it is already out. Whenever you do so you can cast a cantrip as part of the same reaction.

Blood Hunger System

Feeding restores 1 hunger per quantity of blood consumed and 1 vit so long as you are above 4 hunger

Max is 8 + con modifier

Every day you do not feed the hunger meter decreases by 1

8-5 lose 1 vit per day in control but hungry

4-1 lose 2 vit very hungry

0 you are starving and feral losing 3 vit per day and insane until feeding

You must spend at least 5 minutes feeding on the life forces of a creature with at least 6 INT and that is not a construct or undead. Feeding on the following will restore 1 hunger per quantity consumed: draining a medium creature of ¼ of their blood supply. This will reduce their vitality by 4. For a small creature, it will be ½ their blood supply and will reduce their vitality by 8. For a large creature, it will reduce their vitality by 2 and will be 1/8 of their blood supply. The creature must not have been dead for more than 10 minutes; must be willing, or incapacitated or under another similar effect. You can use this feature to feed beyond the minimum 5 minutes to reduce a creature to 1 vitality and increase the hunger restored. Some creatures with a high enough Constitution may be resistant or even immune to the Vitality reduction.

You gain a flying speed of 60ft. You can use this feature once per long rest.

Your Charisma and Strength score increases by 2.

Immortal age wise

vulnerability to radiant damage and resistant to poison and necrotic

Same height and weight as before becoming a Chevalier 

Your base walking speed is 35 feet.

Blessed with a radiant soul, your vision can easily cut through darkness. You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can’t discern color in darkness, only shades of gray.

You know the light cantrip. Charisma is your spellcasting ability for it. However, the light is a purple orb like a blacklight.

You can speak, read, and write Common and any language you knew before