It is immune to poison, normal weapons, all 1st and 2nd level spells, and to all attacks based on earth.
they fear water-type creatures and attacks
Do we want to just stick with immunity to fire/vulnerability to cold, or do we want to add immunity to earth/vulnerability to water?Helions, though immune to all flame-based attacks, remain vulnerable to water-based attacks, from which they suffer double damage.
A helion can detect invisible at will, and can use detect magic, dispel magic, wall of fire, and earth to fire 3 times per day. It can also control fire completely, changing it to solid, liquid, or gaseous form at will (Saving Throw applies for fire-type creatures).
Purifying Flame (Sp): Three times per day, a helion may limn a creature in harmless fire. This otherwise functions as the remove disease spell (caster level 9th).A helion-can use detect magic, dispel magic, wall of fire, and purifying flame (works as a cure diseuse spell) three times per day. Additionally, a helion can cast affect normal fires at will. It casts all spells at 9th level.
Something like enlarge/reduce person (self only)?However, helions can twist their bodies in an extraordinary range of motion; they can shnnk down to a mere 1 foot across or expand their diameters to 40 feet.