where I am not a fan of the frog person, I did make an alien arcane race back in 3e. (I don't remember all the stats) but it looked 99% human but was an aberration. It took inspiration from the Time Lords (redundant organs) and the DC comics Homo Maji, but the rules came about when the psionic handbook introduced the Elan.
Flavor text they looked like humans but with solid color eyes and hair that had bone 'antlers' growing in it. They COULD live forever. They were hatched (yes they leg eggs) as fully formed adults that resembled elderly humans, then aged backwards for 10 years until they reached maturity looking like a 'silver fox' then ever 50 years they aged backwards 1 human year... until they looked like a 15-20 year old... then they stopped ageing (unless they made the choice to start ageing forward in witch case they could CHOOSE to age 1:1 or 1:2 or any other variable up to 1:50 up to a max of that silver fox look again... then they would automatically start ageing back wards again) they would never die of old age.
The eggs they lay ALSO made them odd (odder) because to lay an egg required 3-13 members of the race at least 1 of each of the 2 genders to spend a month together, and who would lay the egg was random with the group but it had to be TRYING to procreate it could not be an accident but they still had sexual organs. However they COULD have sex with any humanoid race. In doing so (regardless or male or female of this aberrant race) if it was with a person capable of having a child they could produce an offspring.
They sleep like the dead (you could mistake them for dead they do not breath and there hearts don't pump when they sleep) and they can not eat meat at all (I mean they can but it would be like you or me eating dirt), but they CAN eat some minerals like stone. Mithril was a special rare treat that they loved to eat.
they were an old rare race, but one most people knew of. They acted as shepherds (sometimes good, sometimes bad, sometimes looking like 1 but being the other) to the other races... but they did not originally come to this world by gods... infact in there own ways they were gods themselves.
millennia ago, when the elves were a young race 13 outsider/aberration Cthulhu like energy beings took mortal form. they tried to help the dragons and the elves, but found there were too few of them. So they created a ritual to have 'offspring'. every member of the race can trace themselves back to those 13... even though long ago (about the time humans started to show up) the original 13 went 'home'