Vraister said:Thanks for the answers.
I'm running 'Into the frozen waste' this evening and I'm worried about these two creatures.
I probably give them a spot/survival check to notice large holes in the distance and make it two young ones.
The Immoth will be reduced in caster level.
Vraister
That's what I did, give them Survival / listen checks to notice the remorhaz. When they do fall into the hole, let the remorhaz swallow a horse or mule or something. The remorhaz fell quickly in my group because of an archer with Hunter's Mercy spell. A fighter lost his sword to the remorhaz though. The immoth was killed immediately by the wizard's Phantasmal Killer.. so this adventure was really too easy, and the CR's weren't all that bad.