Behemoth of Guardians

As an action, you can cast "Behemoth of Guardians" and you jump 30ft into the air and slam the ground, making a shockwave of ice from the original point. If you're in between the 15 and 30ft radius, your walking speed becomes 10 and you're dealt 3d6 + 2 cold damage. If you're 15ft away from the original point, your walking speed becomes 0, you're dealt 6d6 + 4 cold damage and you become frozen. If a creature that's frozen wants to break free, they must roll a STR or DEX with a DC of 19. If you use this spell, you cannot use it again until the next dawn.