Rules Lawyer's 47-Minute Argument About Opportunity Attacks Ruins Birthday Session

A tabletop RPG session organized as a surprise birthday celebration for one of its players was derailed for forty-seven minutes by a rules dispute about whether a gelatinous cube can provoke an opportunity attack, consuming the entirety of the time allocated for the birthday dungeon's climactic encounter. The DM, Selena Narrative, had designed a custom dungeon themed around the birthday player's character backstory, culminating in a dramatic confrontation with a villain who had been foreshadowed across eight sessions. The confrontation was scheduled to begin at approximately 9:15 p.m. The rules dispute began at 9:12 p.m. The session's hard stop was 10:00 p.m. "The gelatinous cube was not the point of the encounter," Narrative explained. "It was a minor obstacle in the corridor before the final room. It was supposed to take five minutes. It took forty-seven because of Douglas." Douglas Errata, the group's designated rules authority, raised the question of whether a gelatinous cube, which occupies a 10-foot space and engulfs creatures rather than striking them, qualifies as making a melee attack for the purpose of opportunity attacks when a creature moves out of its space. "The Player's Handbook defines an opportunity attack as triggered by a hostile creature you can see moving out of your reach," Errata began, producing a physical copy of the rulebook with seven bookmarks and two highlighted passages. "The question is: does a gelatinous cube have reach? It has no limbs. Its attack is Pseudopod, but it's a cube. Where is the pseudopod?" The ensuing debate involved three rulebooks, two Sage Advice rulings accessed via phone, and a Jeremy Crawford tweet from 2016 that one player argued was superseded by errata and another argued was canonical. The birthday player, whose character was poised to confront the villain he had been pursuing for two months, sat quietly eating birthday cake during the argument. The villain encounter was rescheduled to the next session, which, due to scheduling conflicts, occurred eleven weeks later. "Happy birthday to me," said the birthday player. He has since asked that future birthday sessions not include gelatinous cubes.