Here is a proposed cut scene and ultra powerful event for telling a story's complication and climax on the LMS:
Cut Scene: After completing a difficult dungeon, the players witness a cut scene where the villain unleashes a powerful spell, destroying the nearby city and killing its inhabitants. This raises the stakes by showing the villain's power cannot be stopped.
Ultra Powerful Event: Deep in the final dungeon, the players enter a large chamber to face the villain. However, once inside they have no control as the room starts collapsing around them. Large chunks of debris fall that cannot be avoided, narrowly missing the characters. After much damage, the floor gives out, plunging the characters into an abyss. They regain