For me, the tipping point is in the card type creatures are just much better than sorceries, adding the utility of attacking and blocking, paying sacrifice and convoke costs and everything else you need a body for in Magic
Is it worth it
If you just want to crack packs with an eye towards value, Modern Horizons 2 is the best option because of how many powerful and expensive cards it contains, but you can still get burned if you open too many junk rares
Sure, you have to have a ton of Elf creatures in play, but thats the goal of Elfball anyway
Auction house PWCC claimed it was the first time that a signed Lorcana card had been offered at public auction - with only a few of the first-edition cards autographed by the games creators at that time - reflected in its eventual sale price of $1,620
Note: Prices all come from TCGPlayer over the past calendar year, unless otherwise noted, which are subject to rapid change based on market conditions