[RpR1337]

Actually, if memory serves me right, it goes something like this:

There's an old pair that lives by the river, and Susano visits them one day when they grieve. They say that seven of their daughters were devoured by the beast Yamata-no-Orochi, and only a single one remains (Kushinada-hime? can't recall). Then Susano offers them a deal - since the last daughter will be devoured the next day, give her to him instead of the snake. As they agree, Susano turns the last daughter into a beautiful comb, and puts her in his hair, then starts making an eight doored cabin. He puts a big bottle of fine sake behind all eight doors. Once Yamata-no-Orochi comes to devour the last daughter, it finds the sake and starts drinking. Once all his heads doze off after getting drunk, Susano starts to cut up its body from the heads, but when he reaches its tail, his sword snaps in two. Then when he looks for the cause, he finds a majestic blade in its tail, dubbed "Ama-no-Murakumo no Tsurugi" (Also called the sword of Kusanagi, styled 'grasscutter sword', one of Japan's three imperial treasure weapons, and a symbol of Japan). Probably not 100% correct, been a while since I read the whole story.

Spoiler for Ama no Murakumo:

As for Ama-no-Murakumo, it has some degree of control over weather like lightning and wind, since before he obtains it, and is first in the Netherworld, he states that it's "a cheap copy of Susano". Also, Luo Hao says something along the lines of "master gods recieving aid from subordinate gods, while subordinate gods recieve power from their masters". Therefore, it's plausible that it has control.

Spoiler for Powers:

However, apart from perhaps one last authority, I think we see the entire arsenal of Godou (he might not even get a single one more). I say one more because of Circe's revelation of "dual-wielding the black and white blades", and he himself states that he has absolutely no need for more power, since he has all the power he could ever want (though the 'glass princess', who is - this is only my personal deduction, nothing more, nothing less - probably Oto-Tachibana hime says that because his attitude toward power is easygoing compared to other Campiones, he might recieve power instead.

Edit: about the anime. It has an anime-exclusive plot where as the "last boss", Methis sustituted for Ama-no-Murakumo. I have no problems with not being LN faithful completely (cutting out minor characters like Diana and Andrea f.e., who were more or less comic reliefs in the original story - Diana being a fun accomplice of Karen, while Andrea being the "tsukkomi" of Doni - was probably entirely logical, since they served no meaningful purpose in the LN at all). The problem I have is that the story will probably not continue in anime format, and that is a shame. I'd love to watch it in a 52 episode version, and it's a real shame I'll probably never be able to do so. Well, at least all the content can be read in a very good translation with very few errors or typos (hats off for zzhk!) on BT. Great fortune itself, but roughly said, a bit of sugar in the cup of ripened ****. Sad, tbh.
I like this novel mainly for the juicy details. I find gatherings in the Kusanagi household fun, when the totally dunce and oblivious Godou bears Shizuka's wrath, while Erica laughs to herself, Liliana acts like a dignified but lovestruck maiden, Yuri is just as oblivious as Godou, and Ena strangely understands what's going on, but literally doesn't give a flying damn about it. It's quite romantic and fun, and it should advance in a slightly more unleashed manner now that Godou finally admitted to being a harem protagonist at heart. Can't wait for the end of feb, when the novel translations will start