This is the conclusion to the Prophecies of Redemption Campaign. The characters have sojourned through mountains and lowlands to reach the forest in which the entrance to the demon lord’s citadel can be found.
But the Citadel is not what one could expect. Can the PCs find their way in and survive to tell the tale?
Magic is like alcohol, the more that is used, the more it causes a hangover later on and the less judgement one has when using it. If one waits a while after casting a spell, things "detoxify." A cantrip or two is like a sip of weak beer, whilst a large creation spell is like a bottle of vodka. Cast something too big and you can die from magic intoxication.