Warning: Spoilers below for the adventure, Menace of the Icy Spire.
The icy figures emerging from the frozen flames are clearly not arriving for a picnic. A battle begins and rages across the various rooms of the first floor. More of the figures pop out of the frozen flames and some larger (and more dangerous) ice creatures descend the stairs leading to the second floor. During the battle, it is determined that the frozen flames are actually portals to Elemental Chaos and definitely not something that the players want to enter. The party’s arcane types also determine how to close the portal and do so (but not before some more of the creatures emerge). In the end, the party prevails.