Thats a good dream, if not great strategy
Im left, then, with the option to dismantle the deck for parts, or significantly alter it in some way
Log in RULINGS 2023-06-16 Amass abilities are now written as "amass [subtype] N." Previous cards with amass have received errata to say "amass Zombies N." 2023-06-16 To amass Orcs N, if you don't control an Army creature, create a 0/0 black Orc Army creature token
There is a LOT of ground to cover so I'm not going to waste any more time
When you go to cast a creature with mutate lets call them mutators you announce whether youre mutating or casting it normally, and pay the appropriate cost for that mode
They aren't going away, obviously, but it's pretty safe to say they didn't come at no cost