Valar Morghulis - Valar Dohaeris

This is the coin that Jaqen H'ghar gave to Arya Stark before her journey to Braavos, made as a pendant.

The Faceless Men are a guild of assassins based in the Free City of Braavos, though their members range far and wide across both Essos and Westeros. They command exorbitant fees, but have a reputation for success that is unparalleled by any comparable organization.