Not really. The Regexp nature will disappear, you bless away that. What won't disappear is the fact that the blessed thingy is a MG, i.e. magical. But the Regexp nature will disappear. For instance, you can no longer interpolate the pattern since the string overloading was done by Regexp. So /$re /x won't work the intended way. Note that for /$re/ no interpolation is done, so that still works as expected.