Lovely. And each time it comes back, it's even harder to kill to trigger the deathrattle. Nor does Priest have any means of triggering a deathrattle on demand in Standard.

I don't know how helpful this will be. Sure if there's a bunch of weak minions it will kill them, and stripping everything of 2 Attack could probably help. I'd rather just kill things.

Would Shapeless Constellation transforming into this count as summoning one? Or that might work better as a finale since presumably it would have an 8/8 base and then get all the +1/+1s. I don't think there's a shortage of ways to copy minions, so that shouldn't be a problem.

I don't know at all really. At a glance some Wild Priest legendaries  look pretty good, and some look like they require some build-around. And a few are probably always bad.

I guess there will be something worth spending 4 mana to get two extra copies of. Could be a pretty helpful card.

Did cards like Energy Shaper or Deck of Lunacy ever work out? If not, why would this?

I suppose we should be thankful Stonetusk Boar isn't in Standard anymore. I'm not sure what you would want to copy. Something with an aura that isn't sticky enough?

I don't know if there are enough copy/thief cards in standard to make this work, but this might be a decent payoff for that.

Ah, Drone Deconstructor in spell form. That looked like a pretty good card for just getting one sparkbot, and this gives you three for only one more mana and throwing away the useless body.

Well, crap. There aren't any windfury mechs in standard. That might've made this good for combo fuel, but you'll just be better off playing 2 or 3 cheap cards instead of this.

The big question is will this be useful often enough to include in your deck? I know I've been stuck with shitty opening hands and ended up losing often enough because of that.

I can't see tutoring a mech you probably want to play and giving it a +2/+1 buff ever being bad.

Rogue doing Rogue things. Might get you something helpful, but I don't feel like looking through the 3-cost or less pool of spells for every class.

This could help you with trades that wouldn't normally kill the other minion. Like that 4/4 rush you just summoned is now effectively 8/2. I imagine this being used on combo turns where you focus on enemy minions to halve the amount of cards you need to kill everything. Though often the more cards you play in the same turn, the better.

Unforged this is nothing special, it copies itself once, then both copies die on your opponent's turn. But forged, you can magnetize it to any mech and it will start copying itself. I don't know what mechs you'd want to copy, but it would either need to survive a turn, or be cheap enough to be played on the same turn as this.

The gadgets looks pretty good, and you get one for every mech you play. I'll be surprised if this isn't in every Mech Rogue deck.

So I guess you can bait out a board clear with this, or get your opponent to kill a few of his minions trading, or something like that. Or maybe worm + Absorbent Parasite + Always a Bigger Jormungar would be good. Don't know what you would do with the other two worms, though Fable Stablehand + worm on turn 4 doesn't sound that bad. Perhaps along with Observer of Myths on the turn before.

This will probably end up killing a few minions the controlling player thought would survive the trade. And with the +3 Health buff, maybe the other minion survives instead. Probably not as good as staples like Explosive Trap or Freezing Trap though.

I don't know when Hunter tends to have minions with 4 Attack or more, but a 5/5 rush for 3 mana is always good, right?

Fuck your taunt (unless the health is so high there's nothing left for the face). Also Divine Shield absorbs all the damage, so excess damage effects don't apply, right?