Canceling spell

To perform this spell the user must spit their blood onto whatever they want to cancel such as other's magic. Say a enemy is healing its wounded you can rip open your finger and spit onto their magic source (most use a staff or their hands). If done right the magic circle should turn black and it will reject any more spells for about 1 hours.

Were peoples blood is very effective and it will stun them or put them to sleep for 2 days exactly from many test on creatures, humans, and even my master who got very mad and i lost a toe ;-;)