Knight Otu
First Post
The corresponding section of the 3.0 PHB (page 145, Experience and Levels) says the following:
"A character can only advance one level at a time. If, for some extraordinary reason, a character gains enough XP two or more levels at once, he or she instead advances one level and gains just enough XP to be 1 XP short of the next level."
So, the "adventure" bit was added in 3.5. Personally, I'd say that an adventure may consist of sub-adventures that may conveniently end at the right point to advance a level.
"A character can only advance one level at a time. If, for some extraordinary reason, a character gains enough XP two or more levels at once, he or she instead advances one level and gains just enough XP to be 1 XP short of the next level."
So, the "adventure" bit was added in 3.5. Personally, I'd say that an adventure may consist of sub-adventures that may conveniently end at the right point to advance a level.