Buffing weaker minions out of the Red damage range is a normally viable strategy. Well, transforming minions with blue works against this strategy.
Playing a big dude to “cheat” on the red removal - transforming will deal with it as well.
And if you can’t transform it humbling vision can also help to find positive trades.
Blue is awesome at dealing with threats, but has no real hard removal, they got an answer to nearly everything, but leave you with a body to buff back into action. Here kicks red in again and deals with the small body very efficiently.
But that is just the crazy synergy this type of combination naturally has.
The problem starts to kick in with the enourmous tempogain some of the cards bring along.
Ancient Herald is basiclly a 3/5 for 2 faeria - and makes guessing your opponent’s options (limited by his faeria) nearly impossible.
Ground Shaker is just a better version of a 2 faeria neutral event on top of a solid 5/6 body for just 6 faeria.
You could say he’s also a 5/6 for 4 faeria just by himself.
Mirror Phantasm is just a solid answer to nearly every situation and should -if you want my opinion- not be global at all.
Garudan also more of a tempo play by himself. He’s a 6/6 body with charge 2 and comes with a free 6 mana spell as well. (also said spell needs more lands than garudan himself).
The blue legendary aurora isn’t any better, it is a 1/1 which transforms an other minion into a 6/6 (which in most cases has haste included, because it was already in play)
This might just look like a few cards which are all really strong tempo plays, but the real nightmare starts with the Blood Obelisk, which gives you additional tempo/faeria for any opponent minion killed with a minion effect or minion combat. So if your opponent just builds up an economy and you drop blood obelisk + garudan (for example) he loses his economy, the obelisk gives you a lot of faeria back for free and you have brought a big minion into action.
So now you might think you can just outlast all these crazy cards, because they are mostly gifts so if you try to turtle and stay on your own land will help you to outlast this deck?
Well, you forgot the good utility blue brings into the deck with Aurora’s creation. This card can take the answer from the board, make a copy of it and enables you to play it again - and that without any tempo loss, because it refunds its own cost as a discount on the minion’s copy.
So you have built an economy which is secure against one garudan and a groundshaker? Well, bad luck for you, it’s double Garudan time.
So let sum me up the most important points:
the two colours have a great synergy
together they have just enough cards to build the deck without having to use “mediocre cards”
Their combined tempo gain is - compared with most other decks - a semi-cheat on economies.
Most of their effects are actually global (excluding salamander here), which let’s them use just few coloured lands to get their minions played.
All in all it’s a tempodeck which does not need much economy to start with, has strong global answers to pretty much everything and can even recycle its used answers a second time while having a tempo generating structure somewhere in the back which is nearly impossible to remove for almost any other deck currently used in the metagame.
