Complex sentence: Karna and Arjuna were sworn enemies in the epic, each having taken an oath to kill the other in the battle.The battle between Arjuna and Karna is perhaps the most cataclysmic and awesome of the great epic.
Split into simpler sentences: Karna and Arjuna were sworn enemies in the epic, each having taken an oath to kill the other in the battle. This battle between Arjuna and Karna is perhaps the most cataclysmic and awesome of the great epic.