In Demon’s Souls for the PS3, you’ll notice that the Mausoleum in Boletarian Palace is locked.
Ostrava carries the key, and you usually have to save him three times before he gives it to you. If you’d rather get it quite a bit sooner, just kill him and take it from him to access it early. Also, there is a chance that Ostrava may die before you save him enough times, so you can lose the key forever if that happens.
