Not legal in Standard, Pioneer, Pauper, Alchemy, Standard Brawl, Pauper Commander, Premodern, Old School, Penny Dreadful
Notes & Rules Information
If the target permanent is an illegal target by the time Beast Within tries to resolve, the spell won't resolve. No player creates a Beast token. If the target is legal but not destroyed (most likely because it has indestructible), its controller does create a Beast token.
