Did you know, that when you complete the quest "Total Chaos" from Borderlands, you snatch a Codex page? Probably, but did you notice that you don't give it to anyone? In the Keep, the quest giver doesn't ask for it, he's just glad to be rid of the Cult of Evil Chaos, or at least that all is left are splintered groups they can handle on their own. The chain giver is the same, but that's just natural, these are people from the keep and have no interest in multi-planar artifacts.
What about the Gatekeepers? The teleport guy just teleports and don't lose any word about the codex page. No one else as well. So you know what? We get to keep that page! Imagine the infinitive possibilities, as vast as the infinitive planes. I like to use it to balance the one corner of the cupboard, as it has a short foot, though whenever I accidentally move the cupboard, there is a chance that it planeshifts instead.

What do you do with your codex page?