Ice Hounds

While usually daemonic creatures are associated with fire, ice hounds are the exact opposite.

Description
These extraplanar creatures are the opposite of hellhounds, having a constitution based on cold. Their icy breath can immobilise an enemy in seconds, allowing the ice hound to then bite them to death. Once defeated, an ice hound will melt into an innocuous puddle of water, leaving behind no corpse.

They only appeared once, in Ultima IX.

They are found only in cold regions or high up in the mountains.

Trivia

 * Ice hounds do leave behind several gems. Once having access to fire magic, they are an easy way to quickly accumulate gems for money.