If a mob other than some large mobs passes over the Frozen Device, it will freeze and become an ice statue. This ice statue can be passed through.

If you tap or destroy an ice statue while the mechanical part of the Frozen Device is glowing blue, the ice statue will remain and the frozen mobs will spawn in the same state they were in when frozen.

Can be crafted in Incomplete Crafting Table or Crafting Table.

Frost Crystal Core (1)
Mithril (2)
Celesthium Crystal (1)