I'm an avid Magic: the gathering fan. Unfortunately my parents found out about my hobby. Since I can't play magic as much going incognito, I turn to the internet for a fix. I was mostly doing FFRP until Eldariel and Starwulf led me here.

As suggeted by the OP, I will now post a number of deck lists.

Current Mono-Black Rat Discarder.
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Lands
2x Urborg, Tomb of Yawgmoth
4x Mutavault
3x Swarmyard
13x Swamp (Zendikar)

Creatures
4x Typhoid Rats
4x Drainpipe Vermin
4x Pack Rat
1x Marrow-Gnawer
2x Squelching Leeches

Sorceries
2x Sign in Blood
4x Thoughtseize
4x Inquisition of Kozilek
4x Wrech Mind

Instants
3x Victim of Night
2x Disfigure
4x Surgical Extraction

Sideboard
1x Disfigure
2x Tragic Slip
2x Drown in Sorrow
2x Bile Blight
4x Deathmark
4x Dark Betrayal


How to use:
This deck wins by wrecking the opponent's hand. With all the discarders, surgical extraction can wipe out threats. When the opponent's hand is broken, the Pack Rat comes out to propagate.

Typhoid Rats and Drainpipe Vermin are used to buy time, if they go unanswered then Pack Rat comes out Stronger. Marrow Gnawer is there for longer games. Squelching Leeches takes advantage of mana flood.

There are even more kill cards in the sideboard in case of creature heavy decks. Color hate is there too.

Urborg helps out against mana screw, Swarmyard helps the small rats buy time, Mutavault synergizes well with Pack Rat and Marrow-gnawer.

Pros:
Casual friendly deck
The look on your opponent's face when killed by rats

Cons:
Will not win you FNMs
People will constantly tell you to upgrade to 8 rack


Mono-Blue Illusion
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Lands
4x Halimar Depths
16x Islands

Creatures
4x Phantasmal Bear
4x Lord of the Unreal
2x Adaptive Automaton
2x Grand Architect
2x Phantasmal Image
2x Skaab Ruinator
1x Illusory Angel
1x Phantasmal Dragon

Sorcery
3x Gitaxian Probe

Instants
4x Vapor Snag
4x Mana Leak
3x Think Twice
2x Negate
2x Nullify

Enchantment
4x Spreading Seas

Sideboard
4x Void Snare
3x Dispel
2x Familiar's Ruse
2x Aetherize
2x Rapid Hybridization
1x Negate
1x Nullify


How to use:
Aggro out the opponent with the synergistic creatures.

The spells help draw cards and stall for time. Spreading seas does both plus mana screws most opponents.

Halimar Depths can rearrange the cards.

Pros:
Casual friendly deck
The look on your opponent's face when faced with time stalling shenanigans

Cons:
Will not win FNMs
People will constantly tell you to upgrade to merfolk


That's what I have. After netdecking trial and error, I'll post two more deck lists as well as the card links. Bg 8 rack & Mono-Blue Merfolk. (I can dream, right?) The decks I have posted are the makings of my inner Johnny in the span of almost a year. What do you guys think?