Are there any magical items that can be used in order to reliably generate concealment at range, but do not impair/effect the user? Take the case of, say, an archer-archetype character. They may wish to fight at approximately 15-25 squares of range, and ideally from cover. However, not all battlefields will contain cover at the appropriate distances from the enemies. Ideally, there exists some item that:
- Provides a high degree of cover/concealment.
- Does not inflict penalties on its owner/user.
- Can be used repeatedly.
- Does not scream to the enemy "HERE! HE'S IN THIS SUSPICIOUS PLANT IN THE MIDDLE OF THE DESERT!"
Barring that, any items/powers which meet as many of those criteria as possible may be useful.