| Dragofr |
Chanze Size
One vanara in every 500 is gifted with limited shapeshifting ability. Such a creature can adjust her size at will. She gains the change shape ability and the shapeshifter subtype. Instead of changing appearance, she can use change shape to reduce her size category to Small. Her ability scores don’t change, only her size (and thus her weapon damage); normal size penalties and bonuses to AC and CMD and on attack and skill rolls apply. Changing size or returning to her true size is a fullround action. This racial trait alters the vanara’s type and replaces nimble.
Does the stuff size adapt to the new vanara size ?
| Pizza Lord |
She gains the change shape ability and the shapeshifter subtype.Polymorph
A creature with this special quality has the ability to assume the appearance of a specific creature or type of creature (usually a humanoid), but retains most of its own physical qualities. A creature cannot change shape to a form more than one size category smaller or larger than its original form. This ability functions as a polymorph spell, the type of which is listed in the creature’s description ...
We see that Change Self will follow the rules for polymorph.
When you cast a polymorph spell that changes you into a creature of the animal, dragon, elemental, magical beast, plant, or vermin type, all of your gear melds into your body. ... If your new form does not cause your equipment to meld into your form, the equipment resizes to match your new size.
Since the Vanara isn't changing into an animal, dragon, etc., their equipment resizes to match their new size (weapons will do less damage).
And does a Small Vanara can be affected by Reduce Person ?
You can only be affected by one polymorph spell at a time. If a new polymorph spell is cast on you (or you activate a polymorph effect, such as wild shape), you can decide whether or not to allow it to affect you, taking the place of the old spell. In addition, other spells that change your size have no effect on you while you are under the effects of a polymorph spell.
Size changes do not stack or affect the Vanara while under the effects of polymorph (which their Change Size ability emulates... by emulating Change Shape... which emulates polymorph. Inception!).
| Pizza Lord |
Thus, use Reduce Person is a better option to get Small only if you want +2 Dex / -2 STR
Pretty much. The vanara's Change Size lasts as long as they want and is Supernatural (Su), so it can't be dispelled. Reduce person will only last one minute per level. The only benefit reduce person would have is that it does alter abilities. So if you really needed a +2 to Dex (and the –2 to Strength), that's the only upside the spell would have for a Vanara with Change Size.