Bojuka Bog wipes out graveyards which almost always hits something in a 4-player game
Courtesy of Wizards of the Coast (WotC), check out one of the six mythic rare Gods coming in The Lost Caverns of Ixalan Ojer Kaslem, Deepest Growth
For example, if they dont have any Razorlash Transmogrant, then you dont need Soul Transfer, or if they have multiple Planeswalkers in the sideboard, you probably want Brotherhoods End on the play as well
That being said, the place of Connive on the Storm Scale is currently unknown
It magnifies, massive, damage that can be split up, like Arc Lightning into dealing 9 damage, and it increases damage to foes and their things only, so Red mass burn damage like Pyroclasm will deal four to your foes, but only 2 to your stuff
It does what a rat warlock would: Find strength in numbers, and revive dead rats