Monster Mix: Putting wings on things that should stay on the ground
koboldpress.com
The occasional mad wizard enjoys tinkering with creatures to make them something . . . new. Don't you want in on that? This article combines classic flying monsters (wyvern, roc) with classic monsters that don't (remorhaz, purple worm). It's Monster Mix!
Intelligent alien creatures such as aboleths, as well as the occasional mad wizard or capricious deity enjoy tinkering with creatures to make them more suited for their environments or just as a thought exercise. Then the PCs have to go out and fight things like owlbears or chimeras. Doesn’t it