Two of these modes are tempo loss card advantage modes
More importantly, his attack trigger doubles counters on all Spiders and legendary creatures you control
If you've already got a lot of cards from The First Chapter, apart from the guaranteed foils in the 2 decks, it might be more cost-effective to put your money towards boosters, unless you're looking to pick up the cards from either of the starter sets quickly, then the fixed nature of the decks will get you those quicker than randomized boosters
Especially when you have to get past 1 and 2
These lands will always be able to produce one color of mana, and unlocking the other color of mana is relatively trivial
Scene of the Crime distinguishes itself not only as a cantrip but also a land, letting you slip it into your deck at virtually no cost while netting the occasional artifactfall trigger from cards like Kappa Cannoneer