Simple RAW Thread for 3.5 #32: More Seasons than the Simpsons

[Troacctid]

Q 169

Urban Companion:Does it mean Urban Companion can benefit from any and all things which are usually affect the Familiar?
If yes, then how about the feats such as Improved/Celestial/Dragon/Darkness Familiar?

Some things but not others. For example, Improved Familiar still requires an arcane spellcaster level, which, as a druid, you probably do not have.

Q 176

If a spell trigger/completion item is crafted on a plane that has an Enhanced Magic trait pertaining to the contained spell (e.g. Wand of Fireball on the Plane of Fire), how are the item and its creation cost affected?

Item creation is mostly unaffected (although see the rules for Fireshaped items, DMGII 275). The Enhanced Magic trait only applies to spells as they are cast. However, a spell cast from an item would be affected, unless the trait says otherwise (such as the Astral Plane's Enhanced Magic trait, which explicitly does not apply to spells from magic items). If you used a normal wand of fireball while on the Plane of Fire, it would be enhanced.