This is a study of the effectiveness of not the individual but a group of individuals. This is an Open Ended Plot which will not be fleshed out by a single person but by who ever chooses to add content.
Shadows gather…and linger.
Chekov's Spell -- This spell has a two-fold effect. The first is to make the target item almost-unnoticeable to anyone not specifically looking for it. The second is that someone who has seen the item will remember it when they encounter a situation that would be perfectly solved by use of said item.