As it'll be a little while, yet, before I convert my campaign to 5e...
Does anyone have a solid Pathfiner conversion of the kythons (from BoVD)? Or, failing that, at least a solid 3-to-3.5 conversion?
I don't recall ever coming across a
Pathfinder version of the Kythons or a 3.5 upgrade. AFAIK there isn't an official 3.5 version of them since the
Book of Vile Darkness never got an WotC Web Enhancement to upgrade it to 3.5.
Doing it for the CC is outside our remit, since the Creature Catalog is about converting monsters to 3E that never got an official edition-upgrade, and the Kython started out 3E.
A "Homebrew" 3.5 update just to show what the numbers would look like ought to be OK, though. Something like:
Adult Kython (Medium Aberration;
Hit Dice: 10d8+30 (75 hp);
Init: +6;
Speed: 30 ft. (6 squares);
AC: 24 (+2 Dex, +12 natural) touch 12, flat-footed 22;
Base Attack/Grapple: +7/+10;
Attack: Bite +10 melee (3d6+3 plus poison);
Full Attack: Bite +10 melee (3d6+3 plus poison) and 4 claws +9 melee (1d8+1);
Space/Reach: 5 ft./ 5 ft.;
Special Attacks: Kython weaponry, poison;
Special Qualities: Blindsight 60 ft., immunities (acid, cold), resistances (electricity 20, fire 20);
Saves: Fort +6, Ref +5, Will +9;
Abilities: Str 17, Dex 15, Con 16, Int 10, Wis 14, Cha 11;
Skills: Escape Artist +8, Hide +13, Listen +11, Move Silently +14;
Feats: Combat Reflexes, Dodge, Multiattack (B), Improved Initiative (B), Power Attack, Weapon Focus (claw);
CR: 5).
Poison (Ex): Bite, Fort DC 18; initial and secondary damage 1d6 Strength.
Skills: An adult kython has a +4 racial bonus to Hide, Listen and Move Silently checks.
I basically just added a few feats and gave it some racial bonuses to skills so its skills would match the original version.