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I thought about making a defender deck with mill thrown in. I didn't think of the Axebane Guardian + Door to Nothingness condition. It's a fun touch that I may add in. I do agree with A_Person, that maybe taking out one condition to add strength to another (it's light on mill and C and D are vulnerable to removal).
Personally, I'd keep only the mill and the door conditions, but put in a Galvanic Alchemist for infinite mana when paired with Axebane Guardian with three other defenders out. It allows for a turn ~5 door activation and a turn 4-5 infinite mill with Increasing Confusion or Sands of Delirium .