My take on zira OTK, featuring some new toys from the winter war.
Its basically a stall and ramp deck, you'll need to play a fair few artifacts early on to create forgelings, you'll use those forgelings to tutor for more artifacts (cam and constructor should be priority targets), making more forgelings to wall with.
You should trade creatures as often as you can, as you want to push your opponent to play out their hand whilst slow rolling your own. The endgame: zira OTK, or using sanguine steel with an all fathers horn.
The new toys from the winter war:
Aether engineer: makes healing buff spells for constructs, which has good synergy here, allowing your tradebait to possibly go 2 for 1, if not better.
Primeval son: this guy is alright. A solid beat stick that generates a fragile spell to pair with our removal.
Ved'ma helicarrier: adds an army to your hand, and is a construct, so aether engineer can tune it up. I've actually won several games where my zira was insta checked, and the Wolfpack either stacked up for fatal, or got transformed with steel and pushed with a horn.
Now the bad: I'm running mend over erode, because I dont have draupnir band. Primeval son makes up for the lack of erode, and mend for no band; just not as consistently.
Oh, and I though baba again den would have a place in this deck, but it got cut out in favour of zmey hydra