WayneLigon
Adventurer
Several things break it for me, but I usually run very genre-tight games.
A druid with a dinosaur would break D&D for me if I'm not running in a homebrew or setting where they are common or have otherwise been explained; Eberron is a good example. If I'm expecting Dark Ages Europe, though, I have a problem with dinosaurs even though they might be in the MM.
And there would be certain cases where they would be acceptable. Prince Valiant uses them at least once, where he goes to a far northern village menaced by 'sea dragons' only to discover they are plesiosaurs. If I was in a low-monster, low-magic world that would be a charming and wonderful addition - once. It's a trick you can pull a couple times a decade and get away with it.
Several of the really weird creatures 'break' D&D for me and I don't use them. That's why I've usually said that if I were in charge of D&D, you'd be able to slap the MM and DMG together at the very least and not lose page count. The digester and destrachan, Ethereal Filcher and marauder, Girallons, Lammasu, the rast and the ravid, the sea cat, skum, shocker lizards, Tojanida, xill and Yrthak are the worst offenders. Their looks are just too 'out there' in a bad way.
A druid with a dinosaur would break D&D for me if I'm not running in a homebrew or setting where they are common or have otherwise been explained; Eberron is a good example. If I'm expecting Dark Ages Europe, though, I have a problem with dinosaurs even though they might be in the MM.
And there would be certain cases where they would be acceptable. Prince Valiant uses them at least once, where he goes to a far northern village menaced by 'sea dragons' only to discover they are plesiosaurs. If I was in a low-monster, low-magic world that would be a charming and wonderful addition - once. It's a trick you can pull a couple times a decade and get away with it.
Several of the really weird creatures 'break' D&D for me and I don't use them. That's why I've usually said that if I were in charge of D&D, you'd be able to slap the MM and DMG together at the very least and not lose page count. The digester and destrachan, Ethereal Filcher and marauder, Girallons, Lammasu, the rast and the ravid, the sea cat, skum, shocker lizards, Tojanida, xill and Yrthak are the worst offenders. Their looks are just too 'out there' in a bad way.