A detailed description of how they work/what they do. Lots of things like that are in game. I picked up some rune things and it says "use", ok what does it do? Click more info and it just says "Damaged on use". Great thanks. Some of the spell names are obvious what they do but some are not, and clicking show more info just shows my effectiveness for casting spells, all spells, no more info about that spell other than what is displayed which is only duration and an arbitrary point number which I assume is the potency. I cannot think of any other RPGs that do not show you a detailed description of the skill when you hover over or click "info", even pre-2006 rpgs.
Another example is staves, I found some enchanted staves and it has a random spell attached to it, what does that do? Does it apply when I cast a spell, is it on hit, do I get that spell temporarily? I like to play games blind without a wiki or guide opened on a different monitor as it sucks out all of the fun, especially just to see skill descriptions. I am sure it is available somewhere in game, but I could not find it.