Castle Death is a location appearing in the Teenage Mutant Ninja Turtles: Black, White & Green anthology series. It is located on an unknown planet in an alternate dimension.
Leonardo is sent to a world in an alternate dimension through an accident that occurs when Donatello tests a theory he has about interdimensional travel. Stuck there, he begins a quest which ends with him becoming known as the Warrior King. He rules the Kingdom of Bane-Sh'arr, whose inhabitants are all anthropomorphic animals. Another of the inhabitants of this world are anthropomorphic dinosaurs. The leader of this kingdom comes to Bane-Sh'arr and steals the Crystal Shard of K'azz, returning with it to the Keep of Castle Death. Leo, along with four of his cohorts, travel across wastelands and Demon Water to Castle Death, where they battle dinosaurs and their leader in order to retrieve the Crystal Shard.