Elemental Series - Akï's Breath

You call upon the breath of the Akï, an ancient race of Wind Elementals from the far north of Faerûn, driven far into the mountains by humans and dwarves. 

You hurl a condensed sphere of frigid air to a point within range. Each creature within 15 feet of that point must make a Constitution saving throw against your spell save DC. On a successful save, their speed is reduced to 0 until the end of your next turn. On a failed save, they become frosted over, and are petrified until this spell ends. At the end of each of a petrified creature's turns, it may make a Strength (Athletics) check against your Spell Save DC. On a success, it breaks free of this effect.

If your race is a humanoid when casting this spell, you must make a DC 16 Constitution save, or suffer the anger of the Akï. In this event, you take cold damage equal to your level.

At higher levels:

If you cast this spell at higher levels, the distance from the point in which a creature is affected by this spell increases by 10 feet for each level above 4th.