At 4th level, you gain access to the 1st Level form of the Ivatha sign.
A wave of thunderous force sweeps out from you. Each creature in a 15 ft. cube originating from you must make a Constitution saving throw. On a failed save, a creature is pushed 10 ft. away from you.
In addition, unsecured objects that are completely within the area of effect are automatically pushed 10 ft. away from you by the ability's effect, and the ability emits a thunderous boom audible out to 300 ft.
At 8th level, you gain access to the 2nd Level form of the Ivatha sign.
All above effects remain, with the following changes:
A creature or object that fails the save now also takes 2d8 thunder damage. On a successful save, half as much damage.
At 12th level, if you choose to specialize in the Ivatha sign, you gain access to the 3rd Level form of the Ivatha sign.
On a failed save, the affected target(s) are also knocked prone.
At 16th level, if you choose to continue your specialization, you gain access to the 4th Level form of the Ivatha sign.
The damage dealt (See 2nd Level) increases to 3d8 thunder damage.
At 19th level, if you devote all of your specialization into the Ivatha sign, you gain access to the 5th Level form of the Ivatha sign.
The damage dealt (See 2nd Level) increases to 4d8 thunder damage.