Gladiator's Band

[Crane]

Give one of each token to Lanista to obtain the Gladiator's Band, which lets you into a locked area of the Coliseum that contains a healing sauna, kitchen, a Viewing Crystal (I presume you can see all Coliseum boss deaths here) and a Statue of Mandrake, which I'm told gives you the Coliseum Champion's Signet if you give it one of each type of Signet (10 kills of each boss).

So, give the following:

Black Widow Token
Brimstone Token
Bristlemane Token
Dwarven Token
Gristle's Token
Herald's Token
Token of Guruk
Token of the Black Hand
Token of the Demilich
Token of the Infidel
Token of the Lone Gladiator
Token of the Twins

Obtaining such a bracelet, as well as accessing the locked rooms in the Coliseum, might also raise Trevayne's eyebrow.