Murphy's Laws of Elements

[waterzx]

When you are playing against a mono-dark using a mono-dark, your opponent will have more devourers than you do.

[Absol]

If there is a Desync your opponent will start playing 0 casting 15/3 Dragons , while you will be playing normally .

That's true for every desynced  games, though.

Every game against Mono Aether will be a boring Dim Shield stall while you're fishing for that Deflag in your deck. In the end, he outdamaged you.
Every time you evolve your Graboid, there will always be a Ragepot ready. Everytime you evolve three Graboids, there will always be a RoF ready.

[Minamikaze]

If you play a flying weapon deck,
your weapons will be packed at the bottom of the deck. 

Whenever you are trying out a new duo/trio deck,
your first opponent will at the 2nd turn take out his discord.

[Aneninen]

46. You'll get the most wonderful starting hand... against a Fake God which is absolutely unbeatable with your deck.
47. Shields love each other. Either you see all of them in your hand or none of them. If you have multiple kinds of shields, you'll get the one which is useless at that particular situation - eg. Bone Wall against an Firefly Queen deck.
48. The best deck design comes into your mind when you're miles away from the Internet.
   48/2 You'll forget it 'till the time you log in.
   48/3. If not, you remembered wrong about something silly. (Eg. oh my... Pulverizer costs Earth to play?)
   48/4. If not, your idea simply s-cks in practice.
49. No matter what you expect the opponent always surprises you. Eg. if you hold back an Otyugh a Fallen Druid plus a Boneyard, expect a Fire Storm, a Lightning, and a Butterfly Effect on the opponents innocent-looking Skeleton. (Even if his/her hand is empty - 2 normal draws plus the other one from the Hourglass will do the trick.)
50. Use multiple Miracles and you'll see them all in your starting hand. Use a single one and you'll never see it for about 10 games.
   50/2. On the very rare occasion you will, you don't need it.
   50/3. If you need it you'll have exactly 11 Light Quanta.

[dexterkwan]

51. The arena special spins pi$$ u off when u change back and forth between 2 rares but can never get those cards. 
52. U antimatter a creature and your opponent antimatters it back. 

[Gunthar]

Other variants of Murphy's Law:

a) When you have at start your nice combo but only one pillar/pend in the hand to run it.
b) Or even worse: You start with just one pillar in your hand and that one get destroyed by the opponent leaving you with just the mark.
c) You have the thorn carapace shield out and your opponents creatures wont get poisoned by it. But if the opponent have it out your creatures are getting poisoned 100% the time.
d) To win against a very strong deck in the arena just to lose after that versus a silly deck.
e) Constantly winning common stuff in vs AI games spins while never gaining the specific weapon/nymph/rares you want.
f) To see in the spins that the first two rolls lands on a rare you want and then the third roll lands on something different.
g) This is even more annoying if the first 2 spins lands on the upped rare you want and the third roll lands on the unupped version of this rare.
h) When you win more games with a silly deck than with your well planned deck.
i) When you have your big creatures out and your opponent plays the gravity shield.
j) When you have your Dimensional shields out and your opponent still punches thru your shield.

[Absol]

Oh look, a Plat game! I picked Poison Dial, this should be easy!
Eh? Gravity Entropy deck? Meh, no worries, i have SoSa!
Mmm, yeah, that's it! I'll just drop this one Sundial so i can EM next turn.
... Of course, there will always be Discord ruining my EM *sigh*
-after that-
Ohey, a special spin! What should i pick?
.. Oh, come on! Match, you three, will ya?
... Guess i have to win 2 more games, then.

[Gunthar]

More of Murphy' Law:

On the last move before you win the browser or the computer will crash.

Or even worse: When you are on the way to fill the last circle in the arena and your next move will let you win this last game then it is sure that the browser or the computer will crash before you can finish the winning move. 

[Gftis]

53) You're playing an OTK deck and your hand starts out with all the cards you need to win, just no quanta.

[whatifidogetcaught?]

53) You're playing an OTK deck and your hand starts out with all the cards you need to win, just no quanta.

Damn. thats rough. I have never had it THAT bad. just no pillars.

If you are using a dune scorpion deck, you will either receive no blessing (or momentums), no scorps, or no source of quanta!

[Belligerence]

54. The one card which can save you never shows up in time.
55. An enemies Discord always messes up your quanta just enough to not allow you to play any cards. Your Discord allows the enemy to drop his entire hand within 3 turns.
56. An enemy using SoSe will automatically receive at least one of the cards which can hard counter your entire decks strategy.
57. Mono fire always has one more Rage Elixir than you have creatures.
58. Your shield will almost never show up in the situation that you need it most. An enemy can and will draw 5 Wings in a row when you're using a mono Life rush or similar.
59. The AI will inevitably steal the permanent you need most, but which it can't use.

That's all for now...

[Dandy]

- You spend a bunch of time saving up electrum and collecting cards to create a specific deck/grinder/fg grinder/arena deck, only to find that it will be(or is) completely nerfed in the next(or current) patch.

- When you get a death nymph as your oracle card, the AI will NEVER use it's ability in the arena, no matter how much death quanta it has.