Krol the Blade

First blizz, let me say I love the item elixir of ancient knowledge. 300% xp gain for 1 hour is awesome. But it's a bit depressing when that hour is out. As someone who has leveled way to many toon, and continues to do so I'd like to see some improvements to this item. It has a 10% drop rate, and I can only assume I was lucky to run across krol while he wasn't being camped.

Please make it a 3 use item instead of just once, or better yet, give it a 24 hour cd, but that you get to keep the item. I think 1 hour per day of triple xp wouldn't be to overpowered.