Metabot's Manual of Magical Maneuvers

Thunderwreathed Fists

3-level Evocation

Energy lances up your arms as you imbue your blows with booming energy of the thunder demiplane, accelerating them to supersonic speeds. For the duration, you use your spellcasting ability modifier for the attack and damage rolls of unarmed strikes. When you use the Attack action with an unarmed strike on your turn, you can make one unarmed strike as a bonus action. Your unarmed strikes deal an additional 1d8 thunder damage, and when you hit a creature with an unarmed strike, it is pushed 5 feet directly away from you.
On a hit, you can channel the spell's energy into a final blow, ending the spell. Each creature within a 20 foot cone in the direction of your attack must make a Dexterity saving throw. On a failed save, they take 4d8 thunder damage and fall prone. On a success, they take half damage and suffer no other effects.
At higher levels: When you cast this spell using a spell slot of 4th level or higher, the damage of the spell increases by 1d8 for each slot level above the third. The damage of the final attack also increases by 1d8. Transfixing Daggers