Drain Soul

Your mastery over dark arts allows you to bend and twist the very essence of ones existence with
your mind. You extend your hand and with dark magic pull out your enemy’s soul from his body.
The target must make Constitution saving throw. On failed save the target takes 3d6 necrotic
damage and half as much on succesful one. On each of your turns for the duration, you force your
target to make Constitution saving throw dealing 3d6 necrotic damage on failed save, and half as
much on succesful one. You regenerate portion of your lost health equal to your spellcasting ability
modifier each time Drain Soul deals damage. If the target dies under the effect of Drain Soul or
from Drain Soul’s damage, you trap his soul in your personal Soul Container. If you can’t store the
soul, you need to use your bonus action in order to consume the soul, or it will be lost. The spell
ends after total of 3 succesful Constitution saving throws made by the target during spells
concentration or when the target leaves spell’s range..