Jisa watches Maitimo's mind from the other side of a wall, her range helpfully extended by Fëanáro's artifact.
Maitimo's mind was a pretty nice garden, at one point. It's a weird sort of garden - it's clearly a lot of different plants, most of them aren't - native - the best metaphor her Sight can offer her is that they're grafts, presumably from other gardens, very skillful healthy grafts but visibly not his, not to start with.
(She can see a bit of Leareth in there. More than a bit, actually.)
If she hadn't seen it before, it would be hard to figure out what it used to look like, because - right across the entire thing, cutting through all of it, is something like a trellis. It's non-native in a different way; her Sight wants to tell her it's metal, some sort of weird exotic metal too, not a material that anyone's garden uses. It's pretty elaborate, with lots of pieces, it reminds her of how even the practical building components in Quendi designs are also art pieces in their own right.
Every single plant in the garden, at least everything bigger than a blade of grass or tiny weed, is at some point knotted through it.
It's clearly been there for a long time. Plants that are not meant to be adjacent to each other, but were pulled that way by the disruption, have grown together. The oath shapes everything.
...It reminds her obscurely of a lifebond; it's not the same kind of thing, lifebonds are native to the mind in question and this isn't, but it has the same kind of depth. Actually, no, it reminds her even more strongly of a Companion's mind. The sense of something present that was built there, not grown, but is even more unbreakable for not being natural. Her Gift can't budge it at all. And - Companion's parts are breakable, in the right circumstances, but only when two pieces of that unbreakable alien substance come into conflict, the strain between a rock and a hard place. This oath is too careful and skillful for that to work, and - she doubts it would work anyway, at least not without tearing Maitimo's mind to shreds in the process.
She can't fix it. It hurts to admit that to herself, but, in fact, she can't.
She can...make it less dangerous, maybe? The oath isn't removable but some of those plants could be carefully untangled from it, and then she could squeeze in a block. But all the routes to doing that basically involve making him less a person. If he were sufficiently a threat to their operations right now she'd consider it a lot more thoroughly... She's not sure how much of a threat he is, actually.