[The Vorpal Tribble]

Originally Posted by Lord Iames, the CoP

And you might want to add the Cold subtype. Maybe.

Naw, it is adapted to the cold so that it can withstand the chill waters (and being a creature native to the arctic can survive down to 0 degrees without having to make a fort check), but it has no special defenses against cold-based damage.

I also have no idea what these things really look like, but at least there is a good idea of what they do.

Think a seal that looks very much like a human with thick grey hair complete with beard and moustache.

Still, it would probably be appropriate to add ability that enables their child-killing urges (like sniffing out a child, for ex.).

Well, did give it scent which should allow it to smell out children. But really, though they prefer children, they will go after anyone coming upon the ice.