Battlegod Incarnation.
At the sixth level, the cultivator could learn this and transform into an incarnation of the Battle God, slaying everything. It wouldn't be too over-the-top to say that wherever their sword pointed to, there would be no opponents.
In such a state, the degree of damage received would be greatly reduced, and the power they produced regardless of battle skill or cultivation art would also be greatly enhanced by a multiplier.
Sun Mo felt that the Battlegod Catalog wasn't a cultivation art. Rather, it felt more like a 'condition' or a 'state'. It would increase one's combat strength in all aspects.
At the seventh level.
The Ancient Battle God Protector. After using it, one could summon an ancient Battle God clone. Not only would the clone be able to help in attacking, but it would also receive all the damage dealt to the user.