Valen said:My understanding is you can use a wand every round, so I would assume the same for the bow. Even if it took a full round to activate each time, it seems like the weapon would be too powerful. I understand that true strike is just a first level spell, but it still seems too powerful.
You can cast the spell as a standard action. To make use of it, however, requires an attack roll, which in turn requires an attack action. This means you can only effectively get the benefit once every other round.