In addition to this, a big part of the reason these cards were so popular was because the mana in that Standard format was quite bad, to the extent that you were pretty close to wanting Attune with Aether in your decks even before the energy bonus, but once you have the energy bonus you might as well play Harnessed Lightning, which means you may as well play Rogue Refiner to power up your kill spell, and so on
Both cards have their own grading communities and dedicated collectors pursuing PSA 10 copies
Deathtouch vs Indestructible Indestructible is a fantastic counter to deathtouch
If played, the Black Lotus allows players to generate spells quickly
Even more amazing is the synergy of the transformed side, which allows you to put all those returned cards on the battlefield
Say I have four slots or so for dedicated removal spells then I would look to have a couple of cheap creature only cards and a couple of pricier cover all cards