Complex sentence: The process of making the sacred weapon took longer than Ken Arok could stand, and in his anger he took the unfinished weapon from Mpu Gandring and killed the smith with his own weapon.
Split into simpler sentences: The process of making the sacred weapon took longer than Ken Arok had his patience for. In his anger he took the unfinished weapon from Mpu Gandring and killed the smith with his own weapon.