Mallet ensures the elk is within her spirit guardians radius and then points at it, casting sacred flame for 12 radiant damage on failed DEX 15 save

Does she see any threats elsewhere?

Dex:5
Wis:4
Wis:9

8

The last elk is destroyed! Mallet senses no apparent threats at the moment, but you do see that there is still a bright light coming from the cemetery.

Mallet moves along to the cemetery, glowing sprites, still orbiting her and ready to defend her. 

Corinne moves quickly along nearby to Mallet, her glittering vampiric eyes searching the darkness: 4

Waiting for Mortician and Shi, G would follow at the back. 

Perception: 7 

With a PP of 18, Morticia detects no threats as she follows behind you.

A shimmering white light emanates from the wrought iron fence at the cemetery’s gate. The light coalesces into an androgynous humanoid figure clad in white robes with hair of flame and large, feathery wings. Though their eyes burn with a fiery intensity, the being appears kind and benevolent. “Greetings, travelers from beyond the veil. We are Roslar’s Coffer, the collected thoughts and prayers of its people, the sweat and blood they have poured into its construction and defense, the beating heart and vital spirit of the town. But we are broken and fragmented from the foul attack that has slaughtered our residents. We would help you, if you help us. Find our missing pieces—in the schoolhouse, the town square, and the jeweler’s shop—and we will allow you access to the tomb of the false hero. From there, you might find a way to free what is left of this town.” 

Mallet pauses briefly and communes with her god, trying to get a sense of whether this feels right, if this is something that would happen. And if this entity seems trustworthy.

Religion: 21
Insight: 19

Assuming there are no major red flags on either, she nods, and says to the others, "I wanted to see more of what happened to the town anyhow, so this is as good an excuse as any to do so. My guardians will not last forever, so let me take the van and see if anything rousts itself. I'll try to stay away from the missing pieces so as not to hurt them. Let's go."

(How many minutes are left in her 10-minute spell? Assume it was about a minute to finish the battle and move to the cemetery gate, and then maybe another to listen, and reflect, and eight minutes to go explore?)

Shi perks up at the mention of spirits and puzzles. She nods excitedly, agreeing to help without a thought, four pale blue orbs rising into the air around her.

(I vote we start with the town square, for no particular reason!)

 Mallet knows that a loci spirit is an apparition created from a saturation of positive emotional resonance and excess psychic energy. Typically, they arise in places with connections to previous miracles, benevolent guardian spirits, or good-aligned deities. Loci spirits infuse a specific area; Their psychic energy heightens the positive emotions experienced there to create a feeling of peace and protection. A loci spirit also manifests a unique ceremonial power linked specifically to the emotional energy that birthed the spirit. With this information in mind, Mallet can tell that the spirit is truthful and that if you help them, they will let you access Roslar's tomb.

(Seven minutes or so).

G would nod trusting in Mallet's confidence. They were comfortable with starting where Shi suggested.

Corinne nodded, still wrapping her head around a spiritual manifestation of an entire community’s experience. “This seems like your domain, Shi. I’ll follow your lead.”

As you all approach the town square , you spot a glow coming from a wide porch on one of the buildings adjacent to the square. The glow emanates from a pair of translucent figures that resemble an elderly couple. Their forms are indistinct, so it is difficult to tell their races and genders, but the figures are holding hands as they sit in ancient rocking chairs on the porch and look out onto the square. The figures rock slowly back and forth, and the squeak of their old wooden chairs echoes eerily. 

An old stone pool stands in the center of the square, its water stagnant and murky with dirt and rotting vegetation. Next to the pool is an oddly overgrown flower bed filled with strange, squirming flora surrounding an enormous pitcher plant. You can see the translucent figures shaking their heads and making sad clucks with their tongues.

Shi looks over everything consideringly. "Perhaps we should do something about the flower bed," she suggests. "The spirits seem unhappy about its current state."

G would join Shi in her review of the flower bed. They'd scrutinize the spirits mannerisms prior to their approach to see if the spirits are true in their actions and have no ill intentions/participation. The Paladin would then lean on their survival skills to see if there are any signs of natural hazards on their approach and inspection, and whether there are any signs of wild creatures in the area, or a concerning lack there of.

Insight: 6
Survival: 23

G does not notice any wild creatures in the area, which lines up with what Jando told you about everything being dead. You do notice however that these oversized pitcher plants are actually Crypt Flowers, which makes them more than just unsightly nuisances to get rid of, it makes them monsters to destroy. 

Roll initiative.

Crypt Flower1:8
Crypt Flower2:18
Jando:7
Morticia:15

Mallet initiative: 4

Spirit guardians is still going, right? And are we close enough to be within range of the crypt flowers?

G initiative: 21

 Noticing the vile plants, G strides forward ahead of the group and hurls a pair of axes.

Attack: 20 Damage: 4
Attack: 10 Damage: 5

Initiative: 6

Corinne not wishing to tire herself too soon, pulls her whip out and lashes at the plants with her non predator strength.

LASH 1: Attack: 20 Damage: 7

LASH 2: Attack: 25 Damage: 6