This was a very rare night in Toril, with even the usually bright and dazzling Suren being overshadowed by the towering flames.
The Undead Tribe had scattered a large amount of Combustion Powder within ten meters near the city wall, then cast a row of Fire Wall Technique. Amidst the rapidly blazing fire, the pile of half-orc bodies gradually turned to ash, washed away by the melted snowwater, slowly flowing along the city wall towards the western sea.
This basic material for making fireworks was innumerable in the hands of the Undead Tribe... Even people without patience would try to see if they could become an Alchemist at first... To them, the high entry cost of alchemy materials was negligible.
Moreover, the crucial point is that they wouldn't admit their lack of skill until confirming they indeed couldn't do it. Being able to make fireworks requires being part of a minority!