Abrupt Decay is the even more competitive counterpart to Assassins Trophy, which essentially does the same but only against nonland permanents with cmc3 or less
Im guessing you were pretty excited to go back to Theros then
Just think of Grunn, the Lonely King attacking alone with Rafiq on the battlefield: Grunn doubles its power and toughness, gets any exalted triggers, and then gains double strike to smash in for over twenty points of damage
You can dish out +1/+1 counters and ramp faster since all your merfolk explore, and Hakbal doesnt need you to tap anything to accelerate
The only downside was that theres a deck included that you are supposed to play against
I expect the mythic conspiracies to be bulk mythics, the rare conspiracies to be bulk rares, and the non-rares to be true bulk