Taking class levels: reqs?

[randomling]

I would definitely go with the "Int 3" requirement, as Int 1 or 2 is animal-like intelligence. Not to mention the fact that half-orcs take a -2 to Int, unless the -2 would take their Int below 3, in which case their Int is 3 (the minimum for humanlike intelligence).

As for multiclassing character class with "monster levels" -- sure, I'd allow that.

 

[Knight Otu]

IIRC "Int at least 3" is a requirement for a Player's character in the PHB (chapter 1?).

And, IIRC, is also written in the DMG. Personally, I'm having few problems with monsters gaining class levels, as long as they're reasonably intelligent. (Nope, animals and beasts cannot take levels IMHO )