A hellish-red swirling mass of dancing flames advances toward you.
AC 21, touch 21, flat-footed 14 (+6 Dex, +1 dodge, +4 size)
Heat swarms are highly territorial and attack any creatures (other than their own kind) entering their domain. Several swarms often work together to drive away a common foe.
A heat swarm attacks by moving on top of and engulfing its foe.
Str 1, Dex 24, Con 14, Int 6, Wis 10, Cha 6
The defensive abilities includes “construct traits”, but the creatures Type is “outsider”. GMs are encouraged to ignore the construct traits defensive ability entry.
Environment Para-Elemental Planes of Heat
Organization solitary, mass (2-4 swarms), or holocaust (7-12 swarms)
A heat swarm is a mass of flying, aggressive, foul-tempered elementals from the Para-Plane of Heat. A single heat elemental that makes up a heat swarm resembles a thumb-sized ball of fire with vaguely discernible facial features.
When encountered on the Material Plane (which is a very rare occurrence indeed), a heat swarm is most often found in a highly unbearable (by human standards) climate such as an active volcano.
Section 15: Copyright Notice – Tome of Horrors Complete
Heat Swarm from the Tome of Horrors Complete, Copyright 2011, Necromancer Games, Inc., published and distributed by Frog God Games; Author Scott Greene.