Archenemy is an older format and these new Scheme cards update the Archenemy rules to be more in line with Commander
Basically stacking up Mana Leaks just showcases how the card is a limp counterspell and never more than while stacking up Disfigure increases the utility of the effect a lot
Trainer cards often give you the advantage of drawing extra cards, searching for cards, or laying down energies faster
Collectible dealers find out the latest trend and figure out there are highly desirable products that arent being produced any longer, so they buy them all up and sit on them, causing artificial scarcity
Violent Outburst is the only 3-mana cascade effect available at instant speed, and it can even buff your own creatures (okay, Im kidding)
Darkness Metal expands the effect of the original by only requiring several monsters of the same type and attribute instead of a specific type or attribute, and by being able to Special Summon any of the player's banished or destroyed monsters once per turn, although they'll be in defense mode with their effects negated
