I need something broken

[Xtomjames]

If it must be purely core classes than a Human Rogue Sorcerer or Human Bard Cleric combination is your best bet. Its hard however to give any great detail because we don't know what level you're starting at. If its level 1 then you've got a long way to go to breaking the game and hopefully your DM won't over power you with poorly chosen monsters.

Feats however are key, and when I say KEY I mean KEY, to breaking a character. Choosing the right combination of feats can allow you to do miraculous things. A great combination for the rogue for example, is Deft Strike and Neraph Charge.

If you need help beyond this check out: http://www.imarvintpa.com/dndlive/index.php and http://www.wizards.com/default.asp?x=dnd/lists/feats

Also don't forget about Skill Tricks.