Viridian Key
Obtained:
Trading Bowl of Bland Goblin Salad, Jug of Greasy Goblin Juice and Chunk of Smoked Goblin Grub to Squintrox Dryeyes in Port Jeuno
Notes:
Examining the Treasure Coffer in the Tenshodo HQ in Lower Jeuno with this key item in your possession will allow you to exchange it for certain items (see below).