The resurrection breaks the whole setting and every plot ever invented in it.
Btw, shouldnt Gales orb of magic devouring - which is also Netherese in origin - be able to happily eat the tadpole and any magic contained in it?
I don't think so. Gale's
Netherese destruction orb consumes "the Weave of powerful magic items". With regards to the orb, "only powerful magic items will keep it stable", so a living mind flayer tadpole held in stasis is not quite the same thing.