Invading Worms

This week we'll look at Worms. This deck has been compared to Gravekeepers and Blackwings. It's also rather cheap.
We'll start by looking at the two main monsters: Worm Xex and Yagan.

Worm Xex
Light/Reptile/Effect/4/1800/1000
When this card is Normal Summoned, you can send 1 Reptile type "Worm" monster from your Deck to the Graveyard. If you control a faceup "Worm Yagan", this card cannot be destroyed by battle.

Worm Yagan
Light/Reptile/Effect/4/1000/18000
If the only monster you control is "Worm Xex", you can Special Summon this card from your Graveyard in facedown Defense Position. If you do, remove it from play when it is removed from the field. When this card is flipped faceup, select 1 faceup monster your opponent controls and return it to its owner's hand.

They're quite the pair. Summon Xex, dump Yagan and you get a free monster. That would be the BW similarity with Xex acting as Shura.
Next we'll cover the searcher.

Worm Cartaros
Light/Reptile/Effect/4/1200/500
FLIP: Add 1 Level 4 or lower Reptile type "Worm" monster from your Deck to the hand.

The archtype's Reinforcement of the Army.
Next is the deck's boss. Up until now, the cards have been Hidden Arsenal 1-3 supers, generally cheap.

Worm King
Light/Reptile/Effect/8/2700/1100
This card can be Tribute Summoned in faceup Attack Position by Tributing 1 Reptile type "Worm" monster. You can tribute 1 Reptile type "Worm" monster to select 1 card your opponent controls and destroy it.

The archtype's Gravekeeper's Descendant. Don't worry about his lvl. It's actually a benefit for our next card.

W Nebula Meteorite
Normal trap
Change all facedown monsters on the field to faceup Defense Position. During the End Phase this turn, change all faceup LIGHT Reptile type monsters you control to facedown Defense Position, then draw 1 card for each. After that, you can Special Summon 1 Level 7 or higher LIGHT Reptile type monster from your deck.

Now let's look closely at the wall of text.
First all facedown monsters are flipped faceup. This will activate flip effects and "when this card is flipped faceup" effects (Cartaros & Yagan respectively). Note that there has to be a facedown monster on the field for this card to activate.
Next, during the end phase, all faceup light reptiles you control are flipped facedown. Once they're facedown, you draw a card for each reptile.
Now we get to special summon a lvl7+ reptile from the deck (King). But if no Worms were flipped facedown you don't get to special summon a lvl7+ reptile.
This card makes the deck run and usually creates quite a bit of advantage. But it can be stopped by Solemn Warning.

Now let's look at what we have so far.

3 Worm Xex
3 Worm Yagan
3 Worm Cartaros
2 Worm King

Worm Linx, Worm Apocalypse and Worm Tentacles are tech choices. With the right protection, Linx can survive and net you a fair bit of advantage by letting you draw each turn but first it must be flipped and stay flipped. Apocalypse is currently beaten by 3 Mystical Space Typhoons and Heavy. Tentacles is rather fun as a double attacker.

Another tech choice is Evil Dragon Ananta.
Dark/Reptile/Effect/8/?/?
This card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by removing from play all Reptile type monsters from your side of the field and Graveyard. This card's ATK and DEF are each equal to the number of monsters you removed x 600. During each of your End Phases, destroy 1 card on the field.

Here we have a nomi monster meaning it can only be summoned by the means described in the effect. Generally you'd want atleast 3 Worms to get removed so it'll survive with 1800+ ATK. Now the key reason it's used is for its destruction effect. But be careful as it is mandatory and doesn't specify which side of the field the card must be on. Smart players will leave minimal cards on the field so you'll be left with only your cards to destroy. It's generally run at one or none.
However there is an OTK (one turn kill) deck that uses Ananta, Future Fusion and Worm Zero. But it's inconsistent and often ignored for the control variant.

Another card the archtype loves is Offering to the Snake Deity.
Normal trap
Target 1 faceup Reptile type monster you control and 2 cards your opponent controls; destroy all 3 targets.

Another similarity to BWs as Worms have their own Icarus Attack. Now the difference between them is that Icarus tributes a winged beast while Offering destroys. Before Konami's problem solving text and the card's reprint in LCGX it was a matter of knowing which card could do what. Icarus can tribute facedown winged beasts while Offering can't destroy facedown reptiles.

With the whole archtype being light they can use Honest. And to battle the meta they can easily play around Thunder King Rai-Oh with Cartaros, Duality and Sangan the only cards that don't draw. With the Ra Yellow mega pack out Rai-Oh received another reprint so it should be cheaper than before. The deck is a combo deck so it will generally run Pots of Duality to gather the pieces. Those will be the only truly expensive card in the deck. If you can't get em try Upstart Goblins.

Now let's look at a fully built deck. Budget options will follow the expensive stuff.
16
3 Worm Xex
3 Worm Yagan
3 Worm Cartaros
2 Worm King
3 Thunder King Rai-Oh
Honest
Sangan

10
Monster Reborn
Heavy Storm
Dark Hole
2 Mystical Space Typhoon
3 Pot of Duality/Upstart Goblin
Mind Control
Book of Moon

15
Mirror Force
2 Torrential Tribute
2 Mind Crush
2 Dimensional Prison/Sakuretsu Armor
2 Solemn Warning/Bottomless Trap Hole/Compulsory Evacuation Device
3 Offering to the Snake Deity
3 W Nebula Meteorite

The extra should have whatever you can fit but you should really have Number 39: Utopia and Wind-Up Zenmaister. The game mechanic of exceeds avoids the removal of Worm Yagan and Zenmaister allows you to reuse a couple Worms.

Book stops synchro/exceed plays.
Mind Control grabs a monster you can use to your advantage. If it's a tuner your opp foolishly left on the field you can synch. However you'll be looking for lvl4s to exceed with Yagan.
With all the bouncing the deck does (Yagan & Evac) and searches that go on in meta play Mind Crush adds some disruption.
The rest of the cards are self explanatory and while the deck is 1 card over the preferred and often considered "magic" number the deck has a lot of thinning to make up for it.
This deck by nature is control oriented so be prepared to wait on your optimal moves.
Now invade and conquer your locals.