Ah it's Noble Knights! Isolde turbo right?.... Yes but there's more then just her. What if I tell you this Deck successfully implements every Noble Knight from the King Arthur Lore into one Deck. Noble Knights look a bit flat on the outside but it's a Combo Deck in it's core so let's start going into Detail:
The Starters
In such a type of Deck it's important to see who the Starters for your Combo are. Noble Knight Medraut is by far the number one Combo Starter. Like many Noble Knights he's treated as a normal Monster until you equip a Noble Arms Equip to him. Then he gains 1 Level changes to Dark attribute and can special one Noble Knight from Deck in defense (If he's the only Monster you control). Also he destroys the Noble Arms Equip after.
But that's were the Noble Arms equips start working. Once per turn if they are destroyed they can reequip to one Noble Knight on the field for example the one you just special summoned triggering it's effect in the process.
Many cards get you to this Starting Point. Merlin and Heritage of the Chalice being the best ones for that. Other Starting Combinations with Noble Knight Brothers and such are there too but less efficient. They become Plan B and you will see the rest for yourself should you decide to pick up this Deck.
What comes next?
With Medraut the World lies in front of you. Every Noble Knight you can Special has a specific role and that's why I will shortly list up what for everyone is there from top to bottom:
Laundsallyn
Gives access to a Rank 5 XYZ summon without a second Noble Arms Equip. He can also search for another Noble Arms Card by offering a tribute.
Eachtar
Gives access to a Rank 5 XYZ summon without a second Noble Arms Equip and makes the Summon and on summon effect unchainable for the opponent. Together with Laundsallyn they are recurring Threats from the GY every turn for a little cost.
Pellinore
Enables a Monster Destruction with a Draw 1 on top of it. The lost Noble Arms Equip can then be retrieved with the Rank 4 Artorigus XYZ summon.
Gawayn
He's pretty much just a Name and is better of in your Hand to use it's special summon effect.
Peredur
Very useful to go into Isolde because the lost Noble Arms Equip can be returned to the Hand through his effect and open more options after Isolde special summoned one Noble Knight onto the field.
Drystan
Protects other Noble Knights with less then 1800 ATK from attacks and targeting and thanks to Medraut he destroys one face up card on summon if you reequip the Noble Arms to him.
Iyvanne
Can summon one token for free which enables a easy Isolde summon without loosing the Noble Arms Equip on field and furthermore sets up a Rank 4 XYZ summon with the Help of Isolde. A 500 ATK Boost for all Noble Knights is the Cherry on top.
Borz
He can search 3 Noble Arms Cards from deck, get one to Hand and mill the other two randomly. Choosing the Trap Until Noble Arms are Needed Once Again sets up 3 Quick effect special summons from Deck at any time as well as a free draw and changes the order of the top cards of your Deck.
Bedwyr
Mills one Noble Arms Equip from Deck to GY and as Quick Effect is able to reequip a Equip to another Monster once while he's on field. Good to use in Combination with Drystan as interruption when the setup is already there.
Gwalchavad
Can recycle one Noble Knight from the GY back to your Hand and destroys one Noble Arms equip after that. When the Setup with Bedwyr, Brothers, Isolde and Drystan is there you can create a nice little Ressource and Destruction Loop with build in Targeting and attack protection thanks to Drystan.
Brothers
He has 2400 DFF as a Level 4. He can Recycle 3 Noble Arms/Knight Cards back into the Deck to Draw 1 Card and on Normal summon only he can special up to 2 more Noble Knights from Hand enabling a 3 Material King Custennin to Bounce up to 3 Cards from the opponent and potentially Rank Up into a Artorigus.
Custennin
If he's used for a Extra Deck summon you gain an additional normal summon. Very useful if one of the Noble Knights you wanted to special summon from Deck is already in your Hand.
Artorigus
Just a Vanilla 1800 Beatstick but it's good to get him into grave early to setup Lady of the Lake or Avalon. He's the easiest way to access your Level 5 Synchro Monster with Lady of the Lake combined.
That's nice and all but what's the payoff?
The big payoff in this Deck is the Rank 5 XYZ Monster Sacred Noble Knight of King Artorigus or in similar fashion the Rank 4 XYZ Artorigus, King of the Noble Knights. Both can equip themselves with up to 3 Noble Arms Equip spells from the GY when they are summoned. Thanks to Isolde you will be able to freely choose which ones you want.
The Rank 4 can destroy Spell and Traps on the Field up to the Number of Noble Arms Equips you control. The Rank 5 one can destroy one Monster on the field and if he's send to the GY he specials another Noble Knight back from the GY.
The easy to achieve Dream is a 4k Beater with Targeting protection and the ability to prevent destruction twicr per turn. You can add a Destroy 1 Set Card from the opponent by sacrificing 500 ATK and Direct attacking by paying 500 LP depending on which Noble Arms you choose on top of that.
Since the Noble Arms can reequip themselves once destroyed, be recycled with Peredur and the Artorigus bosses you can repeat every effect easily 4 times every turn. So how does: Gain 2000 LP and Destroy 4 set Cards from the opponent sound?
Just a little more Spice
You might notice there are a few Monsters which are not Noble Knights. Merlin earlier mentioned summons any Noble Knight from Deck but he can also at quick effect speed no matter when XYZ or Synchro summon using Monsters on field. He turns up the OTK potential of this deck to 11.
Morgan is a handtrap which acts as Omni Negate which is strong but needs a little setup to work.
Gwenhwyfar is a Noble Arms Equip disguised as Monster and can recycle itself every turn back onto a monster as equip Spell. She gives a one time destruction protection for Light attribute and win every Battle before Damage Step ability for Dark Attribute. Also a little 300 ATK are for both Attributes.
Lady of the Lake like earlier mentioned is there to get the Synchro 5 onto the field. He is the only card which can search any Noble Knight/Noble Arms card including the 3 Noble Knight Spells.
The Problems
Wow this Deck sounds like a meta contender for sure.... yeah no it's not all good here too. If the opponent removes every Noble Knight from the field, you can't reequip the Noble Arms cards and loose important advantage. Loosing Artorigus with 5 Equips through a Kaiju hurts a lot too and often leaves you open for a lethal strike.
If the opponent understands the importance of Medraut and gets rid of him or negates him you can only use your weaker Plan B starters which can't build up a formidable Board that fast. A good Medraut Starter Hand mills half your Deck turn one. Brothers, Gawayn and Custennin can't get to that position alone sadly.
Final Words
It looks like I wrote way to much but really I just scrapped the bottom of the Barrel. When I picked this Deck up I didn't think there's so much hidden Combos and Potential within this Archetype. If you are a player who likes more Complex/Deep strategies this Deck is made for you.
Just recently at time of writing this Deck profile I reached Diamond V league in Master Duel using only Noble Knights. Not many know about this Deck at all and it wins against many unprepared opponents.
Overall Rating: ★★★☆☆☆