The reason the error log shows negative values is thought to be that when 'Roalesk, Apex Hybrid', which is considered to have a low win rate, is designated as a commander to match against 'gentler' decks, a negative weight is set to lower the overall deck weight
The only criticism is that too many digital-only cards have mechanics that generate guaranteed card advantage, like seek, double team, and conjure
This Championship Luffy, representing the pinnacle of competitive play, is typically a powerhouse in game
Five mana might be a little steep for a 3/3, but the ability is too good to pass up and give to another player
So, you can customize pretty much everything
So long as Poxwalkers is in your graveyard, whenever you cast a spell from anywhere that isn't your hand, it returns to the battlefield tapped