Went 12-1 just now at ~C~ against mixed opponents. This deck is not difficult to play. Prefer attacking face because thinking is hard. Deck is unoptimized, first draft so to say.
Look at all these Mythic enchantments! Finally you can put tea house and waystone garden to use instead of letting them collect dust in your collection.
4 Fire Ninjas and 2 Smoke Ninjas: Make it 3-3 if that scratches your itch.
Early turns are weak because the chances to draw something you can play are a tad bit low.
Cards you can replace:
Black Hatter -> Einherjar Thane or Sword Saint
Kara Mourningwives -> Tailroot Wurm, Ronin, anything 4 Mana really who cares
Cloud Pillar Peak or Junkyard Valhalla -> 3rd Giant's Stairway or any Blue medium cost enchantment you have
Grandma Meng's Tea House -> Cairnhenge
Defy Death -> Another Shinobi if you want
Perfect Grade -> Terragon
Draugr -> Hyperborean
Magnus -> Tailroot Wurm or anything 4 Mana
Sometimes you only draw enchantments and lose without having the slightest chance. It happens, just move on.