Green Pact is a heavy armor set. While you have a food buff active, your Maximum Health is increased by 2500 and Health Recovery by 250.
Green Pact is part of the base game and drops in Grahtwood in the Overland content. You can also find it on Guild Traders. Each set item is bound on equip. You can acquire heavy armor, jewelry and weapons for this set in the Wood Elf motif style.