Chaos Siphon

Siphon the Chaos of the soul and bring it into your own. Make a melee spell attack against a creature within your reach. On a hit, the target takes 3d10 necrotic damage, and you can either gain hit points equal to the amount of necrotic damage dealt and any hp leftover gets transformed into temporary hit points or gain the effects of the haste spell for 1d4+1 rounds.

Each time you use this Curse Magika you gain 1d4 [Curse] build up.