Breathing air It is a third level transmutation for clergy, druids, sorcerers and magicians that lasts 2 hours per level (for example, 10 hours at the minimum caster level 5) and allows a creature that normally breathes water to breathe air (it is the exact opposite) of water breathing). It is printed in several books: Champions of Ruin, Wild species, StormwrackY Spell Compendium. A continuous element of breathing air according to the guidelines (which are only guidelines, check with your DM), it would cost 30,000 gp. I would value it less than that.
Stormwrack Y Wild species also have fins to the feet, a second level transmutation for druids, sorcerers, wizards and, oddly enough, sorcerers, who takes a creature with swimming speed and gives it ground speed instead. For a large or large creature (such as an abolition), that would be a speed of 40 feet. Unfortunately, it also costs the abolition of its tentacle attacks, and only lasts 1 hour per level. As a continuous article, according to the guidelines, it costs 12,000 gp. It really isn't worth much, so your DM may be willing to put a price below that guideline.
Anyway, beyond walking, there is a wide variety of ways to gain flight speed; The cheapest, at 10,000 gp, is a feather-wing graft (Devilish folio), but unfortunately now that your abolition is no longer evil, it will drive you crazy. However, check Ernir's necessary magic item lists for other flight methods. A flying carpet It could be the best, at 20,000 gp.
None of these deals with a possibly bigger problem for this is eliminated: dry. Aboleths needs to remain submerged in water to survive; by Lords of Madness On page 17, if one is out of the water for more than a few hours ("terribly painful"), they will enter "prolonged dreams", in which they cannot act, and refrain from considering "a fate worse than death". A few abolitions, known as amphibious abolitions, can tolerate living in swamps and the like; watch Lords of Madness page 20. Conjuring water, putting a gigantic water tank on it. flying carpet, and so on, they could be solutions, but they will all be uncomfortable at best.
Beyond that, there is the polymorph option suggested by your DM.
Lords of Madness It describes an epicilio, an "aerial abolition", as they are known by the few who have found them. "These" do not have the water subtype or swim speed. They gain the subtype of air and a flight speed of 60 feet (good). "
There is no mention of where the peoples come from, how they are formed, etc. In reality it can simply be evolution; The previous section on amphibious chasms is a result of evolution.one But anyway, they exist, and are very similar to abolitions. That means polymorph any object, an 8th level transmutation for sorcerers and sorcerers, can turn an abolition into a magic and will be permanent; it could still be dissipated, but otherwise, the uobiliata can now fly and breathe air (forcing water to breathe is a function of that aquatic subtype that uobilyths do not get). Hire someone to kick polymorph any object For you, once it costs only 1,200 gp, but finding someone capable of doing so can be difficult. A roll costs a minimum of 3,000 gp, and can be somewhat more manageable to find (according to the random table of 8th level rolls, 3% of the 8th level rolls are polymorph any object). Since it is much cheaper than the other options, it is a good idea to have a backup in case it dissipates. Note that if you still can't cast 8th level spells, it's a DC 16 caster level check to cast it successfully (and if it fails, it's a DC 5 Wisdom check to avoid a mishap).
Polymorph any object He could also, as his DM suggested, turn an abolitor into a phoenix. That would probably also be permanent, assuming you don't get additional Intelligence because it is a phoenix (to begin with, it is unlikely that abolitions will be superintelligent). The uobilyth is probably stronger and, no doubt, at least in my opinion, colder.
Finally, just … a word of caution. An abolition is a ridiculously Dominated as a relative. Aboleths are some of the most fearsome and dangerous creatures in books; there is a reason why in Lords of Madness, a book dedicated to aberrations, his chapter was first. Playing as an abolition is doubtful in the extreme. Having one as an additional feature of the class alone, I don't even know, I'm speechless. I understand that your DM allowed it. I strongly recommend considering alone … not doing that. There is a very high risk that it will damage the game, dominate you, trivialize the matches and highlight the rest of the group. Never, I would never allow that in my games.
- Actually, it sounds quite Lamarckian, since it sounds as if individual chasms could gradually get used to a wet but not immersed life.