A jubster is a hybrid of a lobster and a jubbly bird. Players can create jubsters in Creature Creation, in the basement dungeon of the Tower of Life once they complete the Tower of Life quest.
A jubster is created by a player using a raw lobster and a raw jubbly on the jubster Altar of Life in the dungeon and then activating the altar found in the east part of the dungeon. The Homunculus in the dungeon then creates the monster, which appears near the altar and will attack the player.
Killing jubsters is a much quicker way of obtaining raw jubbly than hunting the jubbly birds.
Drop rates estimated based on 1,137 kills from the Drop Rate Project, unless otherwise cited.