The reason you're taking damage is because you changed it from buffing unarmed damage on the player as a constant effect, to applying a damage effect to the player as a constant effect. You need to change it from "Constant Effect > Self" to "Fire And Forget > Contact" - this will take it from an ability that applies a constant buff to yourself to an ability that you have that applies a single shot of the spell to the target your claws make contact with. You'll have to do this to the magic effect itself first, then you can change it on the Spell/Ability. You can't change it on a spell or ability if it already contains a magic effect, you may have to remove the effect prior to being able to change the spell as well. The spell will be locked into that magic effect's casting type and delivery of the first magic effect you apply to it. These are important distinctions as they define how a magic effect is applied. Constant effect means it is unaffected by duration and is constant, like enchantments. Concentration effects are really only used for channeled spells like Flames and Healing (the starter heal) are constantly cast while the attack button is held. Fire and Forget is for everything else that you apply to a target in a single cast with a cast time, like a buff, nuke, heal, or a potion. Delivery is for whom it affects. Self targets the caster. Contact means it doesn't contain a projectile like Fireball would but applies on a hit like a weapon hit or a poison on your weapon or a weapon enchant. Aimed is for your standard projectile like Fireball. Target Actor is similar to Contact in that it contains no projectile per se, however as long as the actor is in the crosshair the spell will affect them. Target Location is used for spells that cast on the ground like Wall of Flames or any of the various rune destruction spells, as well as all the Conjuration summon spells. Read more about magic effects here.