What creature or artifact would you create? (Heroes IV)

In the official expansion, The Coming Storm, the artifact Frost Hammer appears, which gives the ability to freeze an enemy for several turns. There is also a potion of cold, which endows the hero with the ability of an Ice Demon for one battle; its effect, like that of the Frost Hammer, freezes the enemy.

Damn, I forgot about the hammer. I just mean that there's a fire sword, a dark sword, and a light sword, and for the sake of aesthetics, I'd like there to be an ice sword. The Potion of Cold is certainly a good thing, but I repeat that the question here is not so much about whether the artifact is needed, but about making it "look nicer."