In Need Of Chaos Dragon Deck Explanation?

Not my idea, but I saw this online and wondered why is a deck running 32 monsters successful. How many dead draws? How many hands with Monsters five stars and over? How invariably can the deck preform? Why is this deck topping? The last dragon deck I used before I stopped playing for a bit was deep draw dragon. Deep draw dragon was a lot different then this. REDMD has no targets it seems he is just there if he's milled for Pulsar and if that doesn't work removal fodder. Rai-Oh seems to be removal fodder and Sp.summoning stopper. Monk searches Lyla, Wyvern, and Rai-Oh. Dark Flare Removes and helps get REDMD, but why no Red-Eyes Wyvern? Light Pulsar brings REDMD back so I understand it's presence. Card trooper draw power and easy mill. Chaos Sorcerer at three seems to be to much. It seems to be to much removal in general. I don't understand these XYZ monsters, but I'm guessing Wyvern, Rai-Oh, and Tour Guide are all used for these so called XYZ monsters. No Royal Decree? I mean I understand 8 spells because of them being staples and Summoner Monk, but why not just run 43 and run Royal Decree? Or even 42? I don't know much about today's meta-game and that could alone be the issue the lack of understanding. All I'm asking is for an explanation for why this deck was created and how to use it. No I am not going to net deck and steal it, but work off of it and create my own Chaos Dragon deck, but in order to make an effective one I need to understand how to run the deck.

Black Luster Soldier – Envoy of the Beginning x1

Lightpulsar Dragon x3

Chaos Sorcerer x3

Darkflare Dragon x3

Dark Armed Dragon x1

Red-Eyes Darkness Metal Dragon x2

Gorz the Emissary of Darkness x1

Lyla, Lightsworn Sorceress x3

Ryko, Lightsworn Hunter x3

Eclipse Wyvern x3

Thunder King Rai-Oh x3

Tour Guide From the Underworld x3

Sangan x1

Card Trooper x2

Spells: 8

Charge of the Light Brigade x1

Solar Recharge x3

Allure of Darkness x1

Dark Hole x1

Heavy Storm x1

Monster Reborn x1

Extra Deck: 15

Inzektor Exa-Beetle x1

Tiras, Keeper of Genesis x1

Wind-Up Arsenal Zenmaioh x1

Number 39: Utopia x1

Number C39: Utopia Ray x1

Wind-Up Zenmaines x1

Leviair the Sea Dragon x1

Number 17: Leviathan Dragon x1

Number 20: Giga-Brilliant x1

Chimeratech Fortress Dragon x1

Scrap Dragon x1

Black Rose Dragon x1

Brionac, Dragon of the Ice Barrier x1

Armory Arm x1

Magical Android x1

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