1.) Verethragna's Ten Incarnations ( First God he killed )
- each of his Incarnation has a strict conditions for them to use.
- can only use once a day with a 24 hour cooldown or when the sun rises.
2.) Ama no Murakumo no Tsurugi ( Susan'no's Sword )
- can absorb divine powers and converts it into Godou's Strength, can copy an "Authority" of Gods and Campiones Authorities, and converts the Incarnations into new powers.
- has a will of its own.
3.) Athena's Authorities
- For now it's unknown; and how many Authorities are gained from her are also unknown.
- it has the hardest restriction among his Authorities and it can only be used if he has used up all of his Incarnations.
So he has 10 + 1 ( sword ) + 10 ( birth from the swords powers ) = 21 Authorities.
Athena's Authorities are not counted yet.
In the future, if Godou have used Athena's powers; he will gain Athena's Trinity Identity; as the Mother Goddess; as the Goddess of Death; and as the Goddess of Wisdom.
For Athena's powers, it is still a theory based from the LN that I have thought.
But , maybe , it might be true in the future.