From Guild Wars 2 Wiki
Sentient Oddity is a unique item obtained through the Cin Business achievement. It consumes 25 Piles of Bloodstone Dust and 25 Empyreal Fragments in exchange for a Fluctuating Mass, which contains all sorts of various loot.“
— In-game description
It can be fed 6 times a day.
The following vendor will only offer this item once the achievement has been completed
|Grandmaster Craftsman Hobbs||Trader's Forum||Lion's Arch|
|Cin Business||The Head of the Snake||5|
| Find goods that might interest Cin—some that he lost, some that he wants to sell."What have you got for ol' Cin, eh?"
||Found 18/18 of Cin's Goods||5|
|Gleam of Sentience||Ascended||Mystic Forge||0|