Blood Scribe(Cleric)

You have learned, that blood provides strong magical powers. Even the dead have remnants of the spells they could cast when they were alive. You are a harvester of the blood of dead casters and use it to scribe their knowledge into your spellbook.

You have to be a wizard with an intelligence of 20 to select this feat.

When you select this feat, you gain the following traits:

• You gain the Blood Scribe feature, that allows you use the blood of a dead cleric, that has died no longer than 24 hours ago, to copy one of the spells the dead cleric had prepared into your spellbook by an amount hours equal to the spell level and gold equal to 200 times the spell level. The spell counts as a wizard spell for you. Once you use this feature, it can't be used again until you finish a long rest.
  In addition your spellbook can be used as a holy symbol or arcane spellcasting focus.
• You can also spend an hour on a spell you already have in your spellbook. You expend hitdie equal to the level of the chosen spell. After this process the spell is considered Blood Scribed. If a spell is Blood Scribed you gain advantage on constitution saving throws to concentrate on that spell.
• While you are concentrating on a Blood Scribed spell, you gain proficiency in constitution saving throws.
• You can spend your bonus action to increase your spellcasting DC by 2 for the next spell you cast, then you take 3d8 necrotic damage. You can use this feature up to 3 times. You have to take a long rest to use this feature again.