This deck is up there with Milling and Land Destruction (LD) in how annoying it can be for many opponents. Still, it is legal, and it can lead to some very interesting games. It is very weak against Red Deck Wins (RDW) in single games, but in matches with the proper sideboard I am sure it can do well. After all, it is packing a ton of counterspells.
If your opponent cannot remove a Skulker, you can draw enough to make it really big.
And you can use a counterspell to avoid removal.
You can also send a critter back to your opponent's deck and then counter it on the next turn.