It's an oddly sparse temple. There's not much in the way of decoration inside, save for rows and rows and rows of relief carvings on the walls of various scenes from Yralan history. They stretch all the way from when Yrala was a molten ball of rock, to when the first Fey came, to when the first people started building cities. The common theme among all of them is that Kelsic, who is depicted as a glorious knight-like figure, watches over Yrala and intervenes in times of danger and disunity.
The temple is big on the outside, and this isn't wasted on the inside. The ceiling is high, the walls are far apart. For the most part, it's like a big atrium, including the lit part. There are holes in the ceiling every so often, covered with thick chunks of tinted glass. It gives the temple an odd, off-putting lighting, though that's probably on purpose.
The middle of the temple's inner space is dominated by a huge statue of Kelsic himself, but it's not made of gold or anything ostentatious like that. Instead, it's made of the same black stone that everything else is made of. There are a few frozen, dead flowers at his feet. It seems like no one's bothered to do much with the few offerings that have been left there.
There is a conspicuous lack of any other people in there; there's not a single priest to be seen.

...
Gurthang is not a blade to be set aside lightly.