Theres no right way to make a deck, but there is a helpful mindset: find out what you want to achieve, find cards in your collection that support that strategy, and then take your custom-built deck it into battle
PSA 10 cards have: Perfect or nearly perfect centering (55/45 or better)
Whatever you decide, make sure you're having fun
13 Bubbling Muck Get That Mana Now A slightly limiting card but one with plenty of potential, Bubbling Muck is a one-mana sorcery from Urza's Destiny that can turn a few mana into tons
Just looking at this deck makes me feel like youd have to have at least a few screws loose to even try and play this competitively
After all, theres nothing worse than playing a massive green creature, only for it to be killed before it can ever attack