Re: You can't do that...in RPGs!
477: Check your watch while playing in a medieval campaign.
478: Flip the terrain piece upside-down when you cast reverse gravity, or smash it when you cast meteor swarm.
479: Remove class features from players because you think they're too strong.
480: Talk about fourth edition. I don't know what you mean? They skipped straight to fifth from 3.5. Oh, you're curious about that? I don't know, why don't you look it up or something. I certainly have no idea what you mean.
481: But seriously, where's all the commentary on fourth edition LMAO.
482: Say after a TPK, "It was all just a dream"
483: Railroad your players into a story that for some reason involves all your fetishes.
484: Make a homebrew setting that is all just elves. Hundreds of varieties. Please don't.
485: Mix technology and magic in a satisfying way. I'll wait.
486: Run a DMPC. Don't run a DMPC. You cannot, you shall not, and you will not.
487: "Rocks fall, everyone dies"
488: Give your players a Potion of Wish. Like, what were you thinking?
489: Bring your homebrew Neko race to an AL session.
490: Avoid voice cracks during the BBEG's monologue. If someone has a method, tell me ASAP.
491: Use a cantrip to achieve a third level effect. No, I don't care if you're a really high level, or if you have an insanely highly boosted spellcasting modifier. No, stop asking.
492: Lie about what spells you prepared that day, so you always have the right ones.
493: Not keep track of your resources. AKA "These are my last Sorcery Points / KI / Spell Slots" and then five minutes later, "No, wait, I still have a few left to do this cool thing"
494: Argue with thy DM.
495: Play a Drizzt clone. Why does everyone do this?
496: Have a pet Tarrasque at 1st level.
497: Use your noble background to buy out all your enemies.
498: Use modify memory on the DM.