Bloodlust

You expend all of your remaining hit points, minimum of 50, and take on the form of a bloodsucker with extended canines, you bite the necks of each of your targets. Instantly teleport within 5ft of up to six creatures, one after the other, that you can see within 60ft of your starting position. Make a melee spell attack against each target. On a hit you do 8d8 necrotc damage to each target that you hit. You regain hit points equal to half the damage dealt against each creature.  If any creature dies from your attack, they becaome a thrall and fight for you, attacking the nearest creature to them that you consider to be an enemy for 1d6 rounds with their original hit points restored before turning to ash at the end of their last turn.

You must regain at least the number of hit points you expended to cast this spell to remain conscious. If you do not succeed, you fall to the gound, dead. You can be revived through any means of resurrection. Upon dying from this spell - and being revived, you roll a d20. On a 11 or higher your counter for failures resets. On a 10 or lower, it does not reset. If your counter reaches three, you die again. At this stage you must be revived through either true resurrection cast at 9th level, or a wish spell. If you are revived by any other means, roll another d20. On a 11 or higher you are revived as normal, on a ten or lower you are revived but now you are considered undead and will require consuming humanoid blood to stay alive.