The Power of Porcus

Our 5e Land of Azurth came continued last night. In the last adventure, the party had followed some robbed figures into passages beneath the town of Shkizz. There they fought some giant rats and found a door beyond which they could hear chanting. They tried to slowly open the door, but when it appeared stuck, they just forced it.

The  robbed figures encircled a strange fire within a domed room carved from limestone. Above the fire hovered an anthropomorphic boar with undersized bird wings. One of the cultists sighted them, and the group demanded the party leave, as did the boar creature, Porcus, in a stuttering voice.

The party declined, and a melee ensued. The party dished out some damage, but Porcus was no slouch and soon Dagmar was down. Shade went to rescue their healer, but Porcus used their lack of focus as a chance to teleport out of the fight and slip into a secret door at the far end of the room. Our heroes, bloodied, had no appetite for chasing him

The cultists filed out past them with disapproving glances and remarks about both their jailbreak and their rude interruption of the meeting. The group let them go, then followed them back up to the surface.

Dawn was breaking. The party returned to their rooms where their stuff was still intact, and caught a short rest. The next day the townsfolk, once again law abiding, gave the party no trouble. The innkeeper had been among the cultists, but he either couldn't or wouldn't discuss Porcus.

Our heroes decide to go on a stakeout to see what happens at the switch over from day to night behavior. Dagmar was outside as night fell (determined to guard the wagon after two wheels were stolen the night before), and noticed strange flowers abruptly blooming on am unfamiliar tree. Detect magic reveals these blossoms to be magical.

Shade with her woodland lore knows them to be fay-flower trees. They cause madness. They were believed to be extinct.

The party believes it's the long term exposure to these blossoms causing the weird behavior, but where does Porcus enter into this? Before the nighttime revelers come out, they decide to go back to the underground tunnels to lie in wait in the ceremony room.

They do a little bit more exploring and bust into the home of mushroom farmer wererats, then happen upon another wererat pretending to be a captured human. In the ritual chamber, they find two wereboars emerging from the secret room (who they dispatch) but no Porcus. They settle in to wait...