when you chose this subclass you auto learn the spells shocking grasp and chill touch, at later levels you will learn more melee spell attacks, these spells use DEX as the spell casting modifier

skull crusher

during combat, when you make an unarmed strike attack, after you roll damage, roll a D20, if you roll below the amount of damage you may choose one of the following results to apply.

 

LEGS: if you choose this option, you may reduce the targets speed by 15 until the target heals.

 

ARMS: if you choose this option, the target makes attack rolls at a disadvantage until the target heals.

 

HEAD: roll a D20, add you attack modifier, if the score beats a 22, you deal an extra 1D10 force damage

arcane fueled strikes

this feature grants you certain spells to aid you in combat, your fists now count as magic for the purpose of overcoming resistance

horde breaker

you gain 2 melee attacks and you gain an AOE attack

better body

you gain a 15` melee reach, you can now speak all languages, and you have resistance to bludgeoning, piercing, and slashing damage from nonmagical attacks