Barbarian, Path of the Kaiju (V1.1) (Patreon)

Shhhh! This one is a a secret. Might do more down the road but just kinda had to make this one. 

[EDIT] Fixed up the language a little bit, especially for the claws. The basic idea it to hit a target next to your initial target without using another attack action or bonus action. Since you're not aiming directly for them, you attack with Disadvantage. This essentially gives you a free attack in very specific circumstances but it not considered a separate attack. There is nothing stopping you from adding a spell or smite to it as well. You GM may rule that the magic lifts but unless it says "the next time you hit a target" or something like that, I'd let it roll.