Death Imagin
The Death Imagin is the leading force of Kai's Imagin army, created by using Kai's all remaining memories, it is serves as intregal part of Kai itself. And if the Death Imagin destroyed, Kai and his Imagin army would dissolve into sand. The Death Imagin wields a scythe as his weapon, though he overpowered both Den-O Liner Form and Zeronos Zero Form, the Death Imagin is eventually destroyed by Den-O Sword Form and the combined energies of all the good Imagin as well as Zeronos, dissolving Kai and all of the Imagin that he had made contracts with earlier, into sand as a result.