Chains of Water

You create four chains of water originating from a body of water within range, these chains shoot out to the target in a straight line, wrapping around the target's arms and legs and leaving that target restrained. The target must make a strength saving throw against your spell save DC at the end of each of it's turns, with the spell ending on a succeeded save. Any creature of a size of large or bigger has advantage on this save.

Attacks that deal cold damage that target the chains causes them to freeze solid, giving the target disadvantage on it's saving throws against this spell. Each frozen chain has AC 15 and 5 hit points. Reducing a frozen section to 0 hit points destroys it and targeting a chain with an attack which deals fire damage reverses this effect. When a chain is destroyed, the DC of this spell drops by 1/4 of its total rounded up.

The chains have a size depending on the creature they are targeting, against a tiny creature or a small creature the chains have a size of tiny, against a creature of medium in size the chains have a size of small, against a creature of large size the chains have a size of medium and against a creature of gargantuan in size the chains have a size of large.