a common mystic arts technique taught to anyone who can afford to lose the few coppers for the instruction manual few can bring out its true power but if they do they might be nigh unstoppable 

you make a melee spell attack against a creature; on a hit the creature takes 1d12 damage the creature must also make a constitution saving throw dc 17 or be knocked prone and pushed 10ft backwards. but 

The spell's damage increases by 1d12 when you reach 5th level (2d12), 11th level (3d12), and 17th level (4d12).

the damage type can be changed to be either necrotic, radiant, fire, ice, or force.