You can still obviously double +1/+1 counters and other useful counters like shield counters, but also double up experience counters or energy counters as its originally intended
When youre desperate for more creatures on the board, and you keep getting enchantments and auras, it feels bad, but when youve got everyone else doing your dirty work for you, there are few better
Slinn Voda, the Rising Deep Oh look
Of course, the cards you end up crafting will depend on which ones you care the most about, the pack-opening strategy you have, and the type of deck you're building
EDIT - IF YOU WERE GIVEN 1K AND HAD TO SPEND IT ON ONE CARD, WHAT CARD WOULD YOU BUY FOR YOURSELF
Throughout 2023, Rakdos Midrange was the most popular deck in the format, featuring high card quality with format staples like Thoughtseize, Fatal Push, Bloodtithe Harvester, and Fable of the Mirror-Breaker