uncommon evocation force monk 

Cast [>] to [>>>] (somatic, verbal)

Area 15-foot cone or more

Saving Throw Fortitude

You unleash your ki as a powerful blast of force that deals 2d6 force damage. If you use 2 actions to cast ki blast, increase the size of the cone to 30 feet and the damage to 3d6. If you use 3 actions to cast ki blast, increase the size of the cone to 60 feet and the damage to 4d6. Each creature in the area must attempt a Fortitude saving throw.

Critical Success The creature is unaffected.Success The creature takes half damage.Failure The creature takes full damage and is pushed 5 feet.Critical Failure The creature takes double damage and is pushed 10 feet.

Heightened (+1) The damage increases by 1d6, or by 2d6 if you use 2 or 3 actions.

Core Rulebook, page 401.