Wolfsbane's Drowing under a Tide of Green

Wolfsbane was a town on the eastern most boundary of King Augustine's kingdom.  It was not always part of the kingdom, but always part of his kingdom.  It was a reasonably large town with all the typical amenities a settlement outside the main metropolis routes would have. It sat next to a beautiful canyon, to its east, with a small river running through its basin.  
Wolfsbane joined the kingdom before King Augustine began his reign because if there's one thing mankind is proficient at, and consistent with, is occupying and assuming ownership of land that did not belong to them. It wasn't as if King Augustine had ordered anyone to take it from the orcs. It had already been taken from them, ages ago.  It is, however, the last place that was taken from the orcs before they retreated across the canyon to lick their wounds. 
It would be nearly impossible for the kingdom of men to continue their manifest destiny east as the canyon was too great a strategic advantage to whomever was on the other side of it.  It became commonplace for the now human custodians of Wolfsbane to see orc activity on the western ridge of of the canyon, and vice versa. The orcs kept a close watch of the comings and goings of the humans. It's not hard to see the traffic coming from the west into Wolfsbane.  
For generations, the kingdom has been able to keep the greenskins at bay with the persistent presence of a capable wizard at Wolfsbane.  Sometimes they would rotate them in and out as most wizards did not enjoy their station at Wolfsbane where they couldn't enjoy the finest of amenities.  However, one wizard liked the quiet, simple, life one had living on the outskirts of the kingdom.  Zenzymyr volunteered to be permanently stationed at Wolfsbane.  
They made it customary to have his presence be known with regular exhibition of his talents.  Zensymyr was not a showboat, but understood that the orcs feared the arcane, as was proven during mankind's many skirmishes with the orcs as more and more territory capitulated to join the kingdom.  A few times a week, very visible displays of Zensymyr's talents could be see coming from the town. It could be a streak of lightning piercing the evening sky or a illusory beast dancing atop the ramparts. Anything to remind the orcs that their bane occupied Wolfsbane.
The orcs waited for a stormy night to act.  The canyon, filled with a layer of fog, provided the best chance the orcs could have.  The alarms were sounded and Zensymyr was at his station by the time the orcs made it to the walls, a good indication attack would be thwarted despite being outnumbered.  They had walls, they had position, they had Zensymyr.  
From atop his perch, the great wizard Zensymyr began his incantations best suited to quash the green horde. However his efforts were fruitless.  He tried again and again, but to no avail.  Something was different. Something was wrong. Stunned and speechless he looked down upon his hands, forsaken by the arcane that so regularly flowed through them.  All he could do was watch as the walls were breached and the town fell.  His heart broke as he heard the screams of the soldiers, merchants, and farmers below.  People who had faith in his ability to keep them safe. 
Wolfsbane belonged to the kingdom no more.

Conflict Type

Battle