Susanoo

Susanoo is a large katana made of Cobalt Frost, an azure colored metal that is eternally freezing. This katana was crafted by Orjun, God of Skies as a gift for his wife, Idona, Goddess of Oceans. The katana is the Symbol of Power for Idona, Goddess of Oceans.
Dormant State.
* The wielder has a +1 bonus to attack and damage rolls made with this weapon.
* Water Blade. As part of an attack action, You strike in front of yourself, releasing a singular, horizontal slash of cutting water forward dealing 1d8 cold damage in addition to the weapons damage.
Awakened State.
When the katana is drawn it perpetually drips seawater which occasionally freezes.
* The bonus to attack and damage rolls increases to a +2.
* Torrent. Your Water Blade ability evolves into Torrent. As an action, you unleash a flurry of strikes dealing an additional 1d8 cold damage for each strike. You may make up to three attacks against any target within your reach. You can use this ability twice before it resets daily at dawn.
* Arctic Fury. You can sheathe the blade and magically cool the seawater, quickly drawing the blade as part of an attack action. This attack deals an extra 1d10 cold damage and you gain advantage on attacks made this way. You can use this twice before it rests daily at dawn.
Exalted State.
As the katana cuts through the air and creatures the seawater flows behind the blade before falling to the ground around the wielder.
* The bonus to attack and damage rolls increases to a +3.
* Crestwater Slash. Your Torrent ability evolves into Crestwater Slash. The damage increases to 1d10 and you make four total attacks which gain the reach property. You can use this ability a number of times equal to your Strength modifier, and regain all uses daily at dawn.
* Glacial Frenzy. Your Arctic Fury ability evolves into Glacial Frenzy. You gain the ability to cast the spell Investiture of Ice. The damage increases to 2d8. You can use this ability a number of times equal to your Strength modifier and regain all uses daily at dawn.