"One moment, let me look." She peers into the creches, looking for monstrous threats.
Machi-e moves toward the sarcophagus. "Let me figure out what this is...Cora...you may want to focus over here for the moment."
Machi-e realizes that there are two magical auras in the westernmost sarcophagus. The first is from a +1 acid resistance shield, but he can't tell the shield type.
Cora detects neither undead nor aberrations in any of the sarcophagi.
"A Ring of Strength Sapping, a rather vampiric little thing. Good if you want to drain the vitality from an opponent," says Machi-e.
Cora gestures at the northern alcove. "Let's take a look at those urns and see who or what they are."
The inscriptions above each urn consist of a name and two years, apparently a birth year and a death year. Rowane recognizes the pillars as columbaria, memorials holding cremated remains; that would make the urns cinerary vessels.
"Please tell me they aren't more children," says Machi-e. He hands the ring to Nezos.
The ring and shield are both inside one of the sarcophagi.
Cora shakes her head. "This is rougher country than I thought when I came out this way." She gestures at the sarcophagus with the magical auras in them. "Should we open that?"
Machi-e preps Open/Close as well.
Cora finds no traps.
Cora nods. "I don't see any traps on it." She steps back a few feet and looks at Machi-e as she draws an arrow and readies to fire at whatever horrible monster is hiding inside the sarcophagus. "Be my guest."
The sarcophagus opens relatively easily, considering that the lid weighs over 100 pounds. Nothing emerges from the interior save the smell of grave dust, and after a moment of anxious waiting you peer in. There is a skeleton in a pile of dust that is likely the remains of its flesh; most of its armor and other accoutrements have not weathered their long internment well, but the ring and a light steel shield have withstood the ravages of time.
"mm...and traps inside the sarcophagus?" Machi-e clears the dust off the skeleton with Prestidigitation, seeing if anything jumps out.
Considering that the dust is part of the remains of the deceased, that might be morally problematic. Nothing jumps out, however.
As paranoid as can be expected, Nezos pokes the skeleton a bit with his sword. "It'd be just like a gnome to make us need either of these further down the line. I'd call their eccentricities a virtue, it's all just turning us around at the moment. Is this a gnome?"
"One second." Cora examines the interior of the sarcophagus as well.
The skeleton is that of a human, and there are no traps inside the sarcophagus.
You are able to retrieve both items with no further issue.
Machi-e sends his Detect Magic cone o' detection down the aforementioned stairs.
Machi-e detects no magical auras, and Cora finds no traps on the stairs. The party descends carefully, wary of another magical trap on the next level down. However, there's nothing apparent. The chamber at the bottom of the spiral stairs is another ovoid, with a set of double doors in the center of the north wall and an altar against the east wall. The front side of the altar is carved to resemble a winged eye, and atop the altar sits a chalice and a small leather-bound book.
"Aroden, the Last Azlanti," says Machi-e. "Either this is old, or we have some folks who have held out hope for Golarion's former hero."
Cora scans the room for undead and monsters (and, incidentally, secret doors). "Let me sweep for more traps." She points at the altar and the doors. "Give me a minute."
"Sometimes that's as much as they can have. They could have even lived around the same time." Nezos keeps his blade at the ready, leaving Cora to her much more effective form of poking around.
"Aroden, the Last Azlanti," says Machi-e. "Either this is old, or we have some folks who have held out hope for Golarion's former hero."
"...er...I mean...hmm. This means someone has been in here...?"
"Nothing else has visited us yet. Interesting." The cleric says following along.
"Well, naturally, since the tomb has not been disturbed, as I have always said," says Machi-e, drawing himself up to his full height.
"The place does its own disturbing. It only now occurs to me how many graves reject their corpses. Barring consecration, that is, but I'd have expected that here too."
There are no traps on the double doors, nor are there secret doors in the room.
The altar has a cup and book on it, neither of which are magical.
Cora stands up from the doors. "I don't see any traps on these doors. Let me look at the altar before we touch the book or the cup."
No traps on the altar, either.
Cora nods. "I don't see any traps here." She gestures at the doors. "Check out the next room?"
The doors open to reveal another oval room, with a high, domed ceiling. Its floor has a coppery metallic sheen, save for three dragon mosaics made of polished blue glass tesserae. The air has a slight sharp smell to it, and there is an inscription chiseled into the wall opposite the doors. It reads, "Baesterogh, Alamitatus, and Vernegash--ych dragonne slayne by Lady Tula of Belhaim and ye Slayers of Nazilli, Battle of Blue Note Hille, 3668 AR."
Peering in, you can see a door in the western wall.
Machi-e does his Detect Magic on the room.
"What's that smell? Chemicals? Ozone? ...the floor is metal, and the dragons are blue. The red dragon trap had fire...don't step in there just yet."
Blue dragons are known to be the only chromatic stormdrakes, breathing lightning and gaining an electrical aura as they age and grow in power.
"As I thought. I think we have a magical electrical trap before us, something that will attack us with contained lighting. Do we praise Tula and the dragon?"
"Maybe we need to praise all three to be safe?"
"A reasonable assumption," says Machi-e.