Kullu is a great mage but an even greater cook, and often combines these two hobbies. To be able to fully concentrate on his research of cooking recipes and spells, he retreated from our world and built himself the Cake Keep Isle on a planar instability, which keeps it hidden for most of the time. Once every year, however, the Magic Bakery Alliance tries to breech the defences of his island, in order to further the knowledge of bakery. Once there, they will have to fight the guardians he made for himself, the Cake Golems.
It is rumoured that Kullu has invented the Ultimate Sweetness Spell, which makes everything taste extremely sweet, even pain. Rumour also has it that he came up with the Refill Spell, which can refill any container as long as there's still a little bit in it.
See also: A Piece of Cake