Diabolic/Get's Edict as staple for black

Today a thought has crossed my head: it has been very painful
But the result is that I've got tired of Diabolic Edict , Get's Edict & Consuming Vapors .
Maybe they are not broken but I've seen how they have become staple cards for my deck and they make the difference among loosing or winning.
I know that their main weakness is that their user can't directly target any creature but, in most of the cases, they work as a Terror which is able to kill any kind of creature, including black-warded, black and artifact ones.
That weakness is occasionally felt only vs. decks filled with a lot of weenie creatures and vs. White deck with resurrection spells, as Emeria, the Sky Ruin.
Also, for they have a silly low casting cost and other side effects: Get's Edict may be used as a mini ammo even vs creatureless decks, while Consuming Vapors may give card advantage (2 creatures for one card) or may become a sort of Timewalk, since it will prevent a smart player from playing any creature for the next round. There is no reason for which the rebound ability should bot be activated, since it is free!
And it is a shame because there are so many nice spells, as Go for the Throat or Dismember, which are really good but almost never find any place in my decks because the cards above are usually much better. So better that almost never I can play without.
What do you think about?

Maybe they are not broken but I've seen how they have become staple cards for my deck and they make the difference among loosing or winning.
I know that their main weakness is that their user can't directly target any creature but, in most of the cases, they work as a Terror which is able to kill any kind of creature, including black-warded, black and artifact ones.
That weakness is occasionally felt only vs. decks filled with a lot of weenie creatures and vs. White deck with resurrection spells, as Emeria, the Sky Ruin.
Also, for they have a silly low casting cost and other side effects: Get's Edict may be used as a mini ammo even vs creatureless decks, while Consuming Vapors may give card advantage (2 creatures for one card) or may become a sort of Timewalk, since it will prevent a smart player from playing any creature for the next round. There is no reason for which the rebound ability should bot be activated, since it is free!
And it is a shame because there are so many nice spells, as Go for the Throat or Dismember, which are really good but almost never find any place in my decks because the cards above are usually much better. So better that almost never I can play without.
What do you think about?