|This one seems a bit hard for some, but it shouldn't be. Easiest way I found was run around without killing any enemies until you find one of the pods that spawns little spiders. Hopefully near the pods you should have a bunch of other enemies. Once you see at least 10 enemies go into AE form with and just attack () the hell outta the little buggers.|
If you don't get it, it's pretty much impossible to not get it on the last level while fighting the Gorgon. When fighting, the Gorgon will spawn twenty or so mini-snakes. Just go into AE form and you shouldn't have the slightest problem getting a x10.