This spell does not have a direct equivalent in vanilla.
Ice Storm
Level: 4
School: Evocation
Sphere: Elemental (Water)
Range: Long
Duration: 4 rounds
Casting Time: 4
Area of Effect: 30’ radius
Saving Throw: None
When this spell is cast, great magical hailstones pound down for 4 rounds within a 30 foot radius of a point selected by the caster. Creatures within the area of effect have their movement speed reduced by 50%, and receive 2d8 points of cold damage for each round they remain inside the storm.