Setherial

I knooow, that's why I suggested vesuva, it's a commen use of vesuva to copy cloudpost and as such have 8 cloudposts in your deck instead of 4. It's way more reliable to get mana fast. Waiting for a second cloudpost or tutoring for one is less appealing

>>Coat of Arms would be amazing in here<<

no it would not be amazing

>>You need more 4 of's the cards that help you the most.<<

no he doesn't , the balance looks quite good as it is.

I would only take 2xWanderwine Prophets as it is mid to late game and 3xSummon the school as it is quite powerful. If you want pure island walk aggro, take 4xlords, 4xMerrow Reejerey. Take Aquitect's Will instead of Sea's Claim. Concider taking Fortify instead of Strength of Unity, it's a good kill.
Another nice card to concider is Silvergill Adept, he adds card advantage and with island walk it's pretty agressive play. Again 22 land is more then plenty for a 2 color aggro.

add 4xvesuvas if you want tons of mana. The deck has a few nice ideas but it looks fragile with only 16 mana, the dependency on Mycosynth Lattice and tons of late game/high mana spells. I don't see it win against either very fast decks or control decks that keep disrupting your gameplay.

you should actually check out the silent killers 2 deck posted in the building on a budget article series on the wizards of the coast site. They made a very nice assassin tribal.
Something you should learn about deck building is that you do not have to take 4 of each spell. Taking 1xProfane Command, 2xConsume Spirit, 2xTendrils of Corruption add a lot to a deck like this. You don't need them early game but they rule mid and late game. I also put 2xCabal Coffers in my assassin deck. Works great.

Take cards like Dimir Aqueduct only 1x.

Reduce the land to 22, you could include 4 dimir signets if you are concirned about mana fix.
Beacon of Tomorrows is not useful as merfolk have their own infinite turn combu with Summon the School and Wanderwine Prophets. Dimir infiltrator has no use in this deck, nor does soul barier. I like Dimir Dobbelganger, it's good in a mill deck but you'll need drowner of secrets to make it a mill deck. Without drowner Merrow Commerce looses its appeal.
What about adding 1xCircu, Dimir Lobotomist

the deck sucks indeed. You don't need howling mines, in fact they work against this deck. You only need 4 mass removal. You need mana accelleration like 4 signets. you only need 1 debtor's knell at most. You don't need dark ritual. Sudden death would be good, faith's fetters, thoughtseize... I played Mind's Eye for carddraw in a simular deck. Creatures like blind hunters or aven riftwatcher also help during the early game and give you a nice target for debtor's knell

wow thanks. I've learned a lot about making a big deck since posting this but your feedback is very useful. I'll probably have another try at a huge deck soon.

You'll find out that having cards in your hand is very important and that blue is a very good color to do that. Mulldrifters are great, I'd increase them to 4. The artifacts you have aren't very good, I suggest you pack 4 Azorius Signets and leave it at that. Maybe try to fit in some more draw like 2xForesee. Remove soul will come in handy, cancel probably won't as you will tap out quite often in this deck. Replace cancel by 4xdisperse or 4xrune snag or 4xnegate.

a singleton that runs Extirpate :) LOL that's ironic. looks cool

strange deck, why do you need 30 land ? The stuff you play is very hard to get down playing 5 colors. How do you survive fast aggro ? I strongly doubt it would win a single game.

I would have to see a manacurve and mana usage for a deck packing this much different cards. I wouldn't worry too much about what they say about playing a lot of different cards though. It actually makes a deck a lot stronger against control but a lot harder to build as well. If you are just starting out, try to work around a few simple combos. Also realize that you do not have the mana fix to play 3 colors.

how do you discard dead cards from your hand and how do you draw cards. I can be wrong but if you don't have that burried alive in your hand or if it gets countered you'll be doing nothing for a long time.
Playing blue-black is a lot easier to draw/discard pull through your deck.

4xSteelshaper's Gift and half the equipment makes the deck less unpredictable. Lightning Greaves would be nice as they are usually hard to deal with. If you play Steelshaper's Gift 1xlightning greaves will do. I like Loxodon Punisher but it might be too much for your 18 land.
Looks good overall though. The weakness is obviously an opponent able to constantly kill your creatures or bounce them.

but he would not beat them would he :)

nice, should be fun to play.

I strongly doubt you'll win games with this deck. you have high cost creatures, only 20 land and almost no mana acceleration/no mana fix. Even if the counters are meant to survive the early game you are unlikely to play them as you will need 2 islands on the board for most of them and your landbase does not provide you with that.
Cryptic command in this deck is very funny, you'll be dead before you can ever play it.
Look up a few mystic snake decks, play simic skyswallowers, coiling oracle,..

4xExalted Angel lol, wish I had 1 :)

Electrolyse is cool in this deck, helps draw cards and they actually are quite useful for removal as well (killing birds, lions, etc...). If I were you I would include at least 1 Swords of Plowshares, 1 Disenchant and one Chastise. They really helped my deck remove some really nasty creatures like Tarmagoyf and Akroma that would have cost me the game. At least one fetchable disenchent will make the difference against a lot of control decks.

ok, the new version is up, the bounce and counters will be missed :)