Grade 0:
4x Stealth Beast, Moon Edge (Critical)
4x Stealth Rogue of Dagger, Yaiba (Critical)
4x Stealth Fiend, Lantern Ghost (Draw)
4x Stealth Fiend, River Child (Heal)
Grade 1:
4x Stealth Dragon, Magatsu Breath
4x Stealth Beast, Leaves Mirage (Perfect Guard)
4x Silent Stealth Rogue, Shijimamaru
3x Stealth Fiend, Oboro Cart
Grade 2:
4x Stealth Dragon, Magatsu Gale
3x Stealth Dragon, Royalnova
3x Hair Stealth Fiend, Gurenjishi
Grade 3:
4x Covert Demonic Dragon, Magatsu Typhoon
4x Covert Demonic Dragon, Magatsu Storm
Generation Zone:
4x Beauty of Light Snowfall, Shirayuki
2x Rain Element, Madu
2x Snow Element, Blizza
What's the point?
The idea of the deck is to hit the Ride Chain and rush the opponent. Since the Ride Chain fills your front row with 9,000 and 10,000 Power vanillas for a turn, it allows you to get 3 attacks in without having to commit anything from your hand, and returns the attackers to the deck so you don't suffer from decks like Kagero killing off attackers. Afterwards, the idea is to Legion Storm and Typhoon to power your field up to unspeakable numbers to push for game, and to stride units in between Rush and Legion to keep your hand and damage at good levels.
MVPs
Covert Demonic Dragon, Magatsu Typhoon
Rain Element, Madu
As I said, nothing else in the Main Deck really does much. Oboro Cart can clone Magatsu's if you're missing them for your Legion turn, but he isn't too helpful. Madu though. Madu puts in some serious work. If you manage to hit the Ride Chain and are sitting on Magatsu Storm pre-limit break and before you want to ride Typhoon and Legion, Madu lets you Stride without losing a Grade 3 that would otherwise be a powerful booster during the Legion Turn.
What the Deck Needs
Davain Clone
The deck would benefit so much from a ride chain fixer like Davain, especially if they removed the "-3,000 Power" skill and replaced it with the Magatsu chain theme. Stick 1 Rear Guard into the soul, ride a card, call a card from the soul, then clone it for the turn. Or call 1 "Magatsu" from the deck for the turn. Either would work, since it would give you 2 extra Magatsu units for the Legion turn. It would be even better if the Davain clone had "Magatsu" in its name so it could benefit from the Legion as well.
Advantage Engine
This is pretty generic, and I said the same thing in the Zeal Deck analysis, but it's still true. Murakumo as a whole has a pretty bad advantage engine since everything is based on temporary and soft advantage. The Magatsu deck can't even make use of cards like Yasuie who can help you convert clones into hard advantage. Typhoon does a much better job than Zeal at making the vanilla Ride Chain pieces usable, but vanilla beats can only get you so far.
Final Thoughts
Like with Zeal, the deck is a solid Tier 2. Murakumo as a whole just aren't supported enough for anything higher. The Magatsu deck can't even make use of Homura Raider, although to be fair Homura is a pretty high maintenance finisher, and Typhoon is a good enough finisher as-is. And as a disclaimer, I haven't been able to test the deck with cards like Rune Star or any of the newly revealed commons and rares, so I may revisit this deck after a little more testing. But for now, I'm placing Murakumo in the contender-but-not-champion category, especially given the deck's inherent terrible matchup against Phantom Blaster Diablo, who is going to run rampant when he gets released.