ShaynaIsHere
he doesn't have special abilities, just that if he went to get water, his truth would probably that his name is Elethiomel and possibly what that means in reguards to the fact that he's using Zakalwe's name
though, the interesting thing about it is that he doesn't use Zakalwe's name to hide what he did. Everyone he meets in the books (aside from Livueta at the end) has no idea of his past. It's not a "running from the law so I need a new name" thing.
a big part of him graduating is to realize that he doesn't need to let the worst thing he did define him utterly, which he's doing to an extent by taking the name
Zakalwe: But I do, actually! Otherwise I might have to really recon with what it means to do one of the worst things a person can do and keep living afterwards
(though it's good to recognize he did wrong Zakalwe, there.)