(You may put the top card of your library into your graveyard.) Once Patchwork Beastie is attacking or blocking, reducing the number of card types among cards in your graveyard won't remove Patchwork Beastie from combat
The back-and-forth between formats fudges the rankings a little bit, but the number attached to these isnt all that important
If you do drop the cash on this powerful bird wizard, just make sure your opponent doesn't know about the whole illegal in all paper formats part
Its a mana rock not unlike Gilded Lotus, except for being color-specific, you get an additional mana, and you also have a card draw ability to get you out of dead hands
From there, if you're not comfortable playing a deck with so few traditional offensive options, you can opt to take copies of a disruptive low-cost creature like Deep-Cavern Bat or something with surveil and card draw potential, such as Faerie Dreamthief.