There's a secret toy you can get in Blackrock Depths! We're going to show you how to find a traveler in the Detention Block with a simple quest that rewards a Rainbow Generator, a fashionable shirt, and Student Fodder for you and your intrepid party members.
Just east of the Ring in Blackrock Depths is a bridge that leads north over lava.
As you get onto the bridge, look down and to the left; you'll see a friendly Dark Iron Dwarf below you on the base of a pillar. Clear the rest of the mobs ahead of you (Blazing Fireguards and a group of Shadowforge dwarves).
It's a long way down ...
It's parkour time! Move to the left side of the bridge near a small brazier. Get onto the railing, hug the rock wall, and jump ahead onto the platform near the wall.
Move to the end of the platform, hugging the wall, and move hard into the rock corner.
Turn with your left shoulder to the wall and run carefully against the wall, until you just fall down into the exposed corner. Drop down onto the rock outcrop below.
Thankfully, the hard part is over! Turn left into a small room, where you'll encounter the Rugged Traveler. There are also a large number of lore books in this room; take a few minutes to check them out.
When you land, he'll have a couple things to say:
Engage him in dialogue, and ask him his name. This triggers the quest Ever After. Click on him again to turn it in to get your rewards:
Rainbow Generator creates rainbows — equip the trinket and target a player to cast a brilliant rainbow anywhere, even in the depths of a Dark Iron prison!
Bonus: There is also a door behind the Rugged Traveler.
Taking the door ports you to a ledge, right above the circle for Lord Incendius! (Just make sure you want to go there; there is no port back). Follow the ledge to the end,