My best piece of advice is to find the deck or style you like, and then pick up all of the core pieces and staples for it
For example, popular Mega Evolutions: Ascended Heroes boosters sell for 17 per pack, instead of the 10 per pack found from other retailers
There are some folks getting Wilderness Reclamation vibes from Mindsplice Apparatus, while others see the deckbuilding constraints a card like this adds
Chris Rush drew a lovely picture
The Iconic Rarest: For most of Magic's history, Black Lotus from the original Alpha set (1993) has been considered the rarest and most valuable card
For years, creatures that were obviously demons and devils of some kind were given other types, like spirits or horrors or beasts, until demons crept back into the setting sometime in the 2000's, I think, and now we can have cards like the VILE MUTILATOR, a giant bat-winged skeleton goat man with fingers like spiderlegs, tatters of rotten skin dangling off its bones, and a six-eyed ram skull head, shown with a sacrificial glowing golden lamb in its clutches
