I'm going to be trying the new C'thun in Minion Mage, with things like Starscryer and Grand Archivist to pull the pieces, then Polkelt to draw the C'thun once he's been shuffled in.
Has it been confirmed that once C'thun is assembled, it will be shuffled into the deck and not just placed in hand?
Has it been confirmed that once C'thun is assembled, it will be shuffled into the deck and not just placed in hand?
This is likely the case.
Always test for counter spell first with a small spell that you can afford to lose!