Beast Within
Instant
Destroy target permanent. Its controller creates a 3/3 green Beast creature token.
Dave Allsop
Rulings
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.
(wotc • 2021-03-19)
If the permanent is still a legal target but is not destroyed (perhaps because it regenerated or has indestructible), its controller still gets the Beast token.
(wotc • 2013-07-01)
Printings
Rulings
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.
(wotc • 2021-03-19)
If the permanent is still a legal target but is not destroyed (perhaps because it regenerated or has indestructible), its controller still gets the Beast token.
(wotc • 2013-07-01)