This is to help fight against absurd life gain strategies, as well as just allowing for some entertaining deck designs
In the latter case, since the door becoming unlocked is what causes the ability to trigger, effects that cause abilities that trigger when a permanent enters to trigger an additional time (such as that of Panharmonicon) won't apply
But this is much better in Commander, where the attack triggers will flow from all directions
Decks that use the shroud mechanic dont often play a swarm of creatures alongside them, so plinking off a creature with shroud using an Edict effect is a time-honored tradition
though not anywhere near as comprehensive as the Lord of the Rings set, the products featuring the Assassins Creed cards are a bit wider in scope than the Commander focused Doctor Who and Fallout ranges
Immerwolf works specifically with werewolves and not just nightbound cards but yes, this good wolf prevents your werewolves from transforming back when its day