This creature resembles a flaming amoeba with tentacles that appear to be flames emanating from its body. The heat of Cthuga's body does 5-50 points of damage to all within 100 yards of it, and it attacks with fire spells at the same time. It cannot be controlled, and is immune to all heat and cold attacks. It is able to cast any fire spell of any type as a 30th level spell caster, at the rate of two per round. While casting fire spells, it also lashes
out with two of its tentacles per melee round; these do 3-30 points of
damage each. It moves as a blink dog and attempts to destroy everything
within any area to which it is summoned. When appearing in any location, its
first act is to summon 1-20 of its flame creatures. Cthuga can only be struck
by +3 weapons or better as all others melt when touching him.
The creature has a direct connection with the Prime Material Plane by way
of a Palace of Fire that it has created in an active volcano. This palace is
said to be filled with treasure resistant to flame and heat: gems, certain
magic items, and the like.