So, I have a lot of doubts related whith the sideboard plan.
Grudge comes in against artifact decks, such as Whir and Affinity.
Apostle's Blessing comes in against decks that have a lot of removal for your creatures, such as The Rock, and decks that have a lot of board presence that you need to dodge, such as Humans.
Collective Brutality comes in against combo-based decks, such as Ad Nauseam, and is an all-star against Burn as all three modes are relevant.
Fatal Push comes in against decks that run creatures which demand an immediate answer, such as The Rock, Phoenix, and Humans.
Inquisition of Kozilek comes in against decks where you need additional discard alongside Thoughtseize, such as Ad Nauseam, Storm, Amulet (debatable), etc.
As far as the edict card is concerned, that’s a good point about Shadow and “go-wide” strategies. They weren’t too excited about it on the Jund thread either it seemed, but that one I don’t understand as much. 'Lots of decks have lots of creatures, and giving the opponent a choice is bad'. Yeah, but it’s Jund. We’re one-for-oneing all their creatures as they put them down, mostly. The opponent’s side of the board really shouldn’t be that wide, if at all.
But there's still no need for an edict effect in Modern. There's no True-Name Nemesis or Sneak and Show here and when we do need an edict effect, LOTV has it covered. There's simply no room for a card like that. What would you cut for it in Jund? Push, Decay, KCommand? Never.
Never? Jund absolutely has a flex slot (or two!) in its removal suite. It changes with the times, but KCommand, Decay, Pulse, Push, Terminate, Trophy, and Dreadbore are all viable inclusions, and are all viable options for swapping with a single Triumph. There’s a need for edict effects like there’s a need for Path. I’m not trying to make a comparison of those two cards, they have many differences. The point is, there’s plenty of difficult-ass creatures to remove in Modern, and Triumph can get around most anything, except multiple creatures, which Jund is well equipped to deal with. There are quite a few decks in Modern with limited creature suites (like Shadow), where Triumph would shine against. Not to mention the discard effect is badass against BGx/Midrange decks where grind and CA really matter. I think to say there’s no need for an edict effect in Modern is a stretch. And yes, we have Lili. But just because I have Push doesn’t mean I’m inherently not going to run Bolt or Terminate or whatever else has an overlapping effect/role. I think the reiteration is great. I’ll be surprised if I don’t see BGx decks playing 1 copy in the 60 in that flex slot with the same frequency as our other flex options.