Unlike most other elemental reactions, Frozen by itself deals no damage. Instead, this reaction stuns enemies and applies a glowing Cryo status above their head for a certain period of time. The duration of Frozen is based on the lowest remaining duration of the two elements applied. This elemental reaction also allows for a follow-up reaction, Shatter, to be performed with a heavy attack from Claymores, Plunging Attacks, Explosions, or Geo DMG. Shatter behaves like an elemental reaction but deals Physical DMG.
Frozen can be ended prematurely by triggering any elemental reactions, including Shatter (and excluding Frozen). The Frozen status can be reapplied on Frozen opponents, but with a shorter duration.
In the open world, portions of most bodies of water can be Frozen by Cryo attacks and objects such as Cryo Slime Exploding Barrels. This ice can be Melted instantly and can cause Superconduct when near Electro-Charged water or when attacked with Electro.
Shattered damage is only affected by the level and Elemental Mastery of the character causing the reaction and the enemy's physical resistance. It ignores the target's defense stat and the attacker's attack stat, and it also cannot deal critical hits.
Shatter occurs before any elemental damage, potentially preventing some reactions. However, the initial element of the Frozen reaction can still persist or be reapplied under the freeze, causing the element to remain after the freeze ends (ex. Let the Show Begin > Frostgnaw > Starfell Sword will remove the freeze through Shatter then Crystallize the Hydro effect underneath).
The elemental mastery bonus and any enemy resistances are applied multiplicatively with the base damage.