"Hey there, you look like a sturdy fellow! Interested in a treasure map? Only a few gold coins and this map to an ancient ruins secret room can be yours!"
A Basic Dungeon Crawl that starts with a map.
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.