Well yes, it is free with no timer thingy. But everyone (ok not everyone) runs chrono on HC so I guessed that one! Which was a wrong guess. But I also thought that putting a treasure piece in a Raid would help get folks used to raiding. Chrono was my 1st raid but I dont know how to raid. I just have done that one, the dragon one, the did Titan once too way back in HC1! Probably my guess was more wishful thinking I suppose as I would love to run desert raid etc. someday.
Titan is a good one too though. Maybe if they do hunt again they will put some in raids.
Anyway, I have one more super-secret one but it is low level heroic so I doubt a 14th treasure bit is there but ill check.! No one has mentioned it so maybe.......