Blood Vein is part spell and part ritual. The caster digs a hole in fresh soil than takes an item of their choice, places the item in the hole. The caster than take their own blood and the blood of creature and puts it on the item casted the spell and buries the hole. The caster makes a DC spell check. If the caster makes the check the item gains magical properties of the caster and of the creature. If the caster fails nothing happens. The number of magical properties is determined on the level of the caster and the power of the creature. It is to the DM's discretion.
The caster and the item become one, if the caster or the item take damage, they both take equal damage. If the caster gets to zero hit points than the item is destroyed. Only the caster may use the item. If someone else uses the item nothing happens.
* - (Casters blood and blood of a live creature.)