Black Ice

Theohar expected something like this: he turned around and, with a single swift leap, reached the opposite window, after which he opened it and tried to climb down, grabbing onto the window frame with his hands, then straightened up, and only then jumped down, thus painlessly leaving the burning building.
He used invisibility again and cautiously peeked out from behind a corner, finding himself behind the king's retinue, ready to burn them all at once at any moment.
He should have taken teleportation, damn it.