Legacy bosses are certain bosses from older Dragon Quest games. It usually contains the final boss and another story boss from the game.
Baramos : He is the first and easiest Legacy Boss you can get. He is from Dragon Quest III and is one of the main villians. His map can be aquired by completing Quest #62 . He drops Aliahan clothes and boots for common drop and a Silver Orb as a rare drop.
Murdaw: He is from Dragon Quest VI and is the ruler of the dream world. His map can be aquired after levelling Baramos past Level 16 and it is a common drop (7-10%). He also drops Somnia gloves and clothes and a Yellow Orb
Dhoulmagus : He is a boss from Dragon Quest VIII and it is the main enemy the Hero hunts for in Dragon Quest VIII. his map can be aquired by levelling Murdaw past Level 16 and it is a common drop (7-10%). He also drops Trodainers , Trodain bandana and Zenithian clothes , helm and trousers and a Purple Orb.
Dragonlord: He is the main boss in Dragon Quest and tries to destroy Alefgard. His map can be only aquired after beating Greygnarl (grotto boss) at a 5% drop chance. He is one of the only bosses who never uses any magic spells (apart from Disruptive Wave). He drops Alefgard boots , helm and armour and a Red Orb.
Nimzo: He is the main and final boss of Dragon Quest V. His map can be aquired by levelling Psaro past Lv. 16 and is a common drop. He also drops Gothan wristband , turban , gumboots and robe and a Blue Orb.