Arilal has found yet another Elvhen ruin in the swamp.
It's not like it's hard. The woods south of Ostagar are fucking packed with ruins, Elvhen and otherwise. And Flemeth only told him to stay away from humans, not from cool ancient ruins he finds. So it's fair game.
He jumps down into the entry hall, chopping away the vines blocking the doorway with his shortswords (which he wields more like bastard swords, given the size of his arms). He enters the tomblike dark of the passageways, killing a couple of giant spiders along the way. Yawn. Then there's a couple of animated Elf corpses, double yawn.
He wants something interesting. He finds it. A giant mirror, cracked down the center but otherwise gleaming without any sign of age. No dust or muck on the glass, no foliage on the intricately carved frame. It hums with mystic energy.
He pokes it, which turns out to be a mistake, because suddenly he's sucked through the glass and into a different place entirely, swearing fluently the whole time.