"I can tell. I can see it written on your face, you know. You already have knowledge about the elemental planes. I do too but the things I know are very limited." Walker could only reference a single shelf of books within any of the races' libraries about the elemental planes. Not a single person from what they knew was able to go back and forth between them.
"I know that Ibis, the former adventurer's guild master, can summon beings from the light elemental plane. But that's the most we know. He can't get information about it without breaking his summons. But there are rankings there. The stronger the light element's affinity and purity, the higher they stand there." Walker waited as Mordant considered things a little bit longer. Luckily there were plenty of stairs to walk down.