That is a upgrade to the spell. Go to the broker and look for spells being sold, or just
craft your own.
You should always keep your spells upgraded as much as possible, expecially the ones you use frequently. Don't waste time buying the App2 spells from the vendors, they are not that much better.
Good place to level is Oakmyst Forest. The mobs are plentiful and quickly respawn. Stop by Castleview Hamlet before going there to pick up some quests.
Good Luck
EDIT: To clarify, the Spider is a Adept 1 version of the spell, which a loot drop. You may find your own while adventuring, or for sale at the broker. If you craft your own, you will still have a beetle.
Edited, Fri Jul 22 16:42:01 2005 by tutanbriarpaw