Almost everything you do is rewarded in some way, as the game hurls booster packs, special cards, gold and mastery orbs at you
I loved my goyfs and Revenant in a casual deck years ago paired with Wild Mongrel and other threshold enablers that let you pitch cards for value
Partner with wouldnt do that here. So the design team decided to go the extra mile on Partner to make it work as safely as possible
Brothers Yamazaki You cant technically have more than one copy of Brothers Yamazaki in a singleton deck, though you may be able to do it after a Rule 0 discussion
Its an artifact too, which matters because several common blue cards care about artifact synergies
Kytheon, Hero of Akros is a notch above by being able to gain indestructible and turn into Gideon, Battle-Forged