Plan A: Use your discard units to place most broken puppies in the void. Turn 4 Glen Fasciata and T5 use Near Perfect Imitation and reanimate something big....twice!
Plan B: On T5 use Unstable Form on Glen Fasciata and get 2 -5 cost units plus a 3/3 mandrake and go from there.
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Euryd might not be the best choice since the copy will be a simulacrae, not a mandrake. If played on Glen, I think the copy will be a mandrake, but also that one won't be able to attack that turn, so you can only hit with basically an 8/8 giant the first turn. Compare that to 2 icaria attacking...