Cruor of Visions

This is a blood magic spell.

You prick your finger with a bone needle as you cast this spell, taking 1 necrotic damage. This drop of blood must be caught in a container such as a platter or a bowl, where it grows into a pool 1 foot in diameter. This pool acts as a crystal ball of telepathy for the purpose of the scrying spell. If you place a drop (or dried flakes) of another creature's blood in the cruor of visions, the creature has disadvantage on any Wisdom saving throw to resist the scrying spell for the duration. 

At Higher Levels. When you cast this spell using a spell slot of 7th level or higher, the pool of blood acts as either a crystal ball of mind reading or a crystal ball of true seeing (your choice when the spell is cast).