Spellstrike

You have learned to cast your spells through weapons, you gain the following benefits:

• When you cast a spell as an action you may cast it through any weapon you are holding instead of casting the spell normally. The spell being cast must be one that requires an attack roll, or a spell that forces one creature to make a saving throw. When you do this you make a normal attack with the chosen weapon, on a hit the target suffers the normal damage from the weapon as well as the effects of the spell*. If the spell requires multiple hits such as eldritch blast or scorching ray do not roll additional attacks, instead on a hit roll damage as if all the attacks had hit, a critical hit doubles all dice. A spell that requires a saving throw still requires the target to make the save as normal, a critical hit does not effect the damage of the spell. You cannot cast a concentration spell this way with the exception of Vampiric Touch**.
• When you make an opportunity attack, you may use this ability to cast a cantrip through your weapon as the attack of opportunity.

*This ability has no additional effect on Booming Blade and Green-Flame Blade, you can only cast those spells normally. You can however cast these spells as an attack of opportunity.

 **When casting Vampiric Touch with this feature, follow the normal rules for casting concentration spells. In addition when attacking with this spell you make a normal attack with your weapon, the target suffers the normal weapon damage as well as the effect of the spell. If another spell is casted through your weapon using this ability the concentration on Vampiric Touch is dropped immediately. While the effects of this spell are active through your weapon and you make an attack of opportunity, the target takes the spells effects on top of the damage of your weapon on a successful hit.