Eager to take on the task at hand, the group requested Peter teleport them to the city. They made their way in after appearing a short ways south of the city. They decided to search the grounds as they headed for the outer city walls and along with finding trails left behind by some sort of hound, they noted that portions of the outer walls still stood mostly unbroken.
Following the tracks, Brok stumbled upon a store of metals beneath the rubble of the city that they marked for future use.

They followed signs of the dogs into a university building, Sophia going in to scout ahead. Brok took this time to scout the exterior of the building and found one of the hounds torn to pieces

The whole group entered after hearing this and quickly found the culprit. Night Walkers. The remnants of men and women that were never able to escape the darkness of night. The creatures tried consuming the students wanting to consume the light of their souls.
During this, Deva decided to test the students and their ward stones in a more serious manner, finding their inability to quickly enter a darkened building foul.

She spilled her blood along the ground, drawing out the creatures of the night for a taste of the powerful fluid. At the same time Peter began assisting the students using his immense magical prowess, drawing out the creatures of night even further. 

The hounds found their way to the blood and after consuming it, began to grow in power, their form combining into one massive beast. The Mutant Hound broke its way into the building, causing the students and even Peter to panic even more. With this new beast before them and the Night Walkers behind them, Peter tried to even the playing field again by blocking off part of the building with a wall of magical force blades. This last casting of powerful magics in the first moments of Night pushed the scales further against the students.
In the first hours of Night, the use of Magics and Rituals and power almost alaways causes the Night itself to respond, seeking to snuff out the Light of Whatever soul created such efects.
Knight, A being Deva and Peter had fought before, rose up and the Mutated Shadow Hound became Knight's Hound, Gvyllgi. 

This shift in the scales of Battle was exactly what Deva was searching for, allowing her to join the frey. Knight struck down Helena in an instant and nearly destroyed her before Peter and Deva swept in and saved the Student. Not wanting to be hindered by the Students, Deva sent them all off to the center of the city to deal with the Mine and find the Heart of Stagard.

The battle that raged behind the students as they fled levelled more of the city that the past few hundred years of decay ever could. Deva and Knight battled, Flame, Lightning and Shadow.

The students quickly made their way to the Central Palace and made their way in through a massive break in the wall. Finding the center of the palace only took a few minutes, all the while the building shook from the battle raging within the city. Within the central room, they found a hole going down into the mine beneath the city but no sign of the massive crystal Heart.

Only Peters eyes caught sight of the invisible creature that snuck out of the Mines entrance. Without a word he seared away the creatures invisibility. 

The strange creature before them introduced itself to them As Obsidna, the Cave Dragon that had lived within the mines for millenia. In stead of immediately battling the creature, much to Brok's dismay, they decided to instead bargain with it. Allowing the creature to make a deal with any who moved into the city similar to the deals it made in times past. Protect the Heart and Mine and in exchange the people would provide the dragon with "exotic" foods. Rabbit's seemed to be Obsidna's prefered meal.
They also agreed not to give the Dragon away to Deva. But that agreement said nothing about Deva coming to speak to the Dragon on her own.  Making a second deal, Deva vowed that the city of Stargard would be neutral territory when it came to the Pact of Dragons, allowing Obsidna to keep her hoard but that Obsidna would protect not just the mine but ALL things the light of the Great Heart touched. Obsidna agreed and gave the students the Heart. Gehnmelfahl took this opportunity to raise the heart on high using his connection to the tree Malkuth to manipulate the roots beneathe them. With the City having a source of protection from the darkness of Night, the students had completed their mission. But Deva rated them relatively poorly for their foolish and timid actions.