Talk:Razor Edge/@comment-204.236.82.221-20170518121049/@comment-45.56.46.26-20180610055138

Still, they aren't IN Yggdrasil anymore. The system currently interpreting the rules of Yggdrasil isn't the Yggdrasil engine, it is the New World.

If they were running on the Yggdrasil engine, then Wild Magic and Runecraft (along with NPC's having life-like reactions of various kinds, or undead created from bodies) would not have any effect.

The Yggdrasil rules are what can't deal with a damage type that is recognized by the New World but would not be possible in the Yggdrasil engine.

This is probably a precision of terminology that is not considered relevant by people who have never tried to get a game engine to run a set of rules designed for a different engine. But if you're going to use the term 'engine' in that context, it's confusing to use it wrong.