Confused :)

Hello peeps!

Been playing for about 5 days now and got the basics down n everything, but certain items I get are a bit confusing for me. Can someone elaborate a bit of what the exact ''use'' of these items are :
+5 Heroic Seal Stone Extractor
Austere Legendary Transcending Stone

Got these from fishing I think and also wonder if it matter much where I fish. (so far only got first 2 options) seems the first one gives me potions and 2nd one gives me temp. stones. Im lvl28 if that matters.

Also had an item that said something about changing attributes of a sealed item (atm I cant find it in my inventory hehe, but I know its here somewhere) ....what attributes will change?


And lastly: It's fun catching mounts n stuff and I wonder what mounts be best for me as beserker. ATM i use Ruby Bloodwyrm for Air and for land well not really got one...just using the ones i catch then i seal them. So def. looking for a land mount that can stick around for couple levels.

Guess that was it till now, hope someone can give me some ansers