"If only I could go back in time I would spend all my money and buy 10 Tarmogoyf when it was first released, I would be rich now"
Consider that Murderous Cut cannot prevent a creature like Siege Rhino from triggering its ability when it enters the battlefield, it cannot kill a Planeswalker, and it cannot stop an instant or sorcery
But given the nature of the card, dead late, terrifying early, it's a no-brainer that 3 would still be the preferred number if legal
We still didn't have anything approaching a "set file," but as someone who is more used to designing for Limited, I wanted to test our mechanics in something that felt like the games of Limited I was used to
Promos (P) Promotional cards - like the aforementioned Lightning Bolt from MagicFest - can come from events, prereleases, special products, store promos, conventions, Secret Lair drops, and various other places where Wizards know we players are willing to pay top dollar for them
If theres a specific card that you want to add to your deck, you can usually buy it from online markets or gaming stores