Yeah, I tried a variant of this deck before. It's rather brilliant with the right draw. It's equivalent to stealing an opponent's creature (killing it and copying it).
Personally, I'd replace the 3 Immortals with 3 more Recluses. Immortals cost a whopping 3
more than Recluses and deal 2 less damage. Given, Immortals can't be targeted, but with this deck, your opponent should target your stronger PU'd creatures than your Recluses anyway. Recluses are nasty.
Replacing Immortals with Recluses makes for a much faster and stronger deck.
Great job on this one.