Quote Originally Posted by Curmudgeon View Post
A 731

The question is pretty much moot, because you cannot "prepare" for level advancement. You go up a level immediately when your XP total is adequate (see Player's Handbook on page 58), meaning level advancement happens on the DM's schedule, not the player's. As such you would only qualify for War Hulk (step 1. Choose Class) if your DM specifically awarded the XP necessary to advance to the next level while your Goliath Barbarian was using Mountain Rage. If your DM did this, all questions about qualification at that point should be addressed to that individual DM. Normally, your level advancement would happen outside of combat and the entry to War Hulk would not be possible.
Except through other common, more permanent means (wearing a continuous Ring of Enlarge Person, having Enlarge Person Permanencied), both of which are both permanent and temporary (you can wear a continuous Ring of Enlarge Person for the entire week that leveling would take you if your DM specified that it would take a week, and then take it off thereafter; as long as you are wearing the ring at the time of level-up, whenever that is, you qualify).

So let's change the parameters slightly: instead of qualifying through Mountain Rage (which is a specific and narrow window, but isn't necessarily part of my question so much as it is the build that inspired it), let's say that this character qualifies for a level of War Hulk by wearing a continuous Ring of Enlarge Person to become Large all the way up to, and through, level-up... And then takes the ring off. What then? If he puts the ring back on, does he regain the class features that were lost prior?