Most important out of everything inside your Prerelease pack are the six booster packs that will give you the cards you need to build your Sealed deck, plus your shiny bonus Prerelease card (which could be any rare or mythic rare in the set!)
Read More: The 10 Best Merfolk In Commander 7 Circu, Dimir Lobotomist Circu, Dimir Lobotomist is a four mana Blue and Black 2/3 with one really redundant ability
Mu Yanling is often going to play as "Three mana, suspend 1, make a 4/4 flying token" and in a world of Teferi, Time Raveler bounces and abundant removal that's not even close to good enough
Finally, there is Castle Ardenvale which gives you the ability to create a 1/1 if you have no cards in hand or are in a tough situation and need a creature on the spot
Pretty useful in, hmmm, I dont know Nekusar
We are going to do it anyway though, because we are amazing, and friendship is magic and stuff