I think that it might make a good tie in, but it doesn't say so in the description. So while its mechanically legal, there should be a good RP reason for it. Like every time you go to a new plane, you look for new specimens to study; or you lived on a farm with giant oozes as a child. Either way, while its RAW legal, I would run it by the DM and see if they're good with it. I think its a cool idea, though.