want to buy eye of the north

Ok, so i want to buy Eye Of The NOrth, but no where around where i live has it by itself. so i have to buy it along with prophecies.

So my question is...if i buy it with prophecies does that mean i have to make a whole new account with that prophecies disc, or does it just let me add more character slots?

Thanks in advance, Nairb

You can just add the key to your current account. How many slots you end up with may depend upon what campaigns you already have. If you already have Prophecies, the only thing you'll gain is EotN.

(There's no need to install it, just add the key.)