I picked up the Sanguine Rose last night. I'm bad-ass.
I'm now a level 23 Redguard.
The Gauldur Amulet is a necklace which grants +30 to health, magicka and stamina.
The amulet is obtained by completing the Forbidden Legend quest chain.
The quest starts when the player obtains a Gauldur Amulet Fragment, or by reading the book the Lost Legends.