Those include cards illustrated by well-known artists, Secret Rares that arent revealed until someone pulls one, or promo cards that were never part of a set to begin with
Brainstorm is legal in Legacy, Commander, Pauper and is Restricted in Vintage
Whenever a player plays a land from exile or casts a spell from exile, you put a +1/+1 counter on target creature and create a Food token
Kokusho is huge as a 5/5 flier for 4BB, and when it dies, each opponent loses 5 life, and Kokusho's controller gains life equal to the total life lost
But these returning characters will only support the main cast - a motley crew of adventurers led by the mousefolk Mabel, Heir to Cragflame, all of whom set out to investigate the tragic fate of a nearby village and become swept up in a quest to prevent the destruction of all their homes