This whole interaction of shuffling your library after you play Brainstorm is very common, and one of the main reasons to play this blue spell
Instead, these have special conditions, like being won in a tournament or being distributed as a prize for participating in local events
Another one where I dont think itll survive, since the rate is awful if you cant turn something in the grave into a demon, but at least the demons have haste to make it so that killing this on sight make it that much more important
It can transform if instructed to do so
These properties derive from commonplace associations with the colors themselves, and from the practical considerations of creating good gameplay
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