Well, he had Val'anyr but the problem is that's a one-handed mace and C'thun has countably infinite tentacles. White-market blacksmiths don't really like it when your minions order "as many maces as you can make in your insignificant lifetime".
Now that I think about it, makes sense the C'thun handbuffs don't display properly on the side: you opponent would know you have it in your hand otherwise.
This version is a bit more reliant on luck since it fights very poorly for board, though that puts it in a good spot vs slowe decks. You can try other more midrange variations where cards like Stampeding Kodo and Fire Plume Phoenix can fight back on board from behind.
That valanyr happens anyway. There is a myth at hysteria's channal that says C'thun always get any handbuffs. F.e: he has taunt already. He always get the +3/+3 warrior handbuff while it in your hand.
Never thought of C'Thun in a buff Paladin deck, looks fun, I'll give it a go, thanks! 8:06 had me in stitches haha. Edit: I forgot, I don't have the pally legendary weapon, is it worth the craft for just this deck?
The only reason I've played this game for so long is because of matchups like these where I can destroy the boring ResidentSleeper meta with fun/creative decks like this one. Nothing else feels rewarding anymore.