Also, if you can't get the Axe, you can animate Dread Statuary and use Shape Anew on that.
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Precisely. It's much like U/G Polymorph.
Needs Awakening Zone, maybe Semblance Anvil. Also, why Steady Progress? If this is about card draw, get Jace's Ingenuity.
Sphinx of Jwar Isle would be a strong substitute for Serra Angel; I feel as though you have enough disruption with Wall of Omens (though Wall of Denial wouldn't hurt) and board control, plus his Shroud is truly dangerous. Pretty strong overall, though.