The group inspect the room closely. After an unsuccessful search, the decide to open the sarcophagus. On the first one, it is written Illugi Swordbreaker, the other is Emerald Warlock. As they open both and find two corpses, most likely to be the one named on the sarcophagus. An amulet is resting on the chest of the corpse of Emerald Warlock. In the sarcophagus of Illugi Swordbreaker, you find a small key.
During that time, in the fountain room, Arkavas doesn't see anything special at the bottom of the fountain. As he looks at the force door, he walks toward it to inspect it. Obviously, the door is of magical nature. As he come near it to take a closer look, he spots pressure plate on the ground.
[SBLOCK=OOC]To open the sarcophagus, it is an Athletic Roll, DC15. Don't bother to roll, as you can retry to open it anyway.
Thanks to Arkavas Passive Perception, another one would have step on the pressure plates.[/SBLOCK]