Until now, the only thing delve made me think of was Tombstalker, and maybe Death Rattle, but mostly because I played a lot of Time Spiral Limited
When is shown a part of another card, or the presence of the black dot is enough
Check current card prices on Scryfall or TCGPlayer, multiply each card's value by its probability of appearing in your pack, and sum the total
During the early turns of the game, you want to be setting up ramp with mana rocks so that in the late game, you can use all the effects and abilities available to you
To appreciate why a lot of players are likely breathing a sigh of relief and raising glasses, lets dig into how these cards earned their lethal reputation and why MTG is punting them from its newest format