They read, Whenever an opponent sacrifices a nontoken permanent or discards a permanent card, you may put that card from a graveyard onto the battlefield under your control. That means you can attack in multiple ways, and as long as youre interfering with your opponents hand and board state, youll benefit massively from it
Sothera, the Supervoid Ive seen people bemoaning Sothera, the Supervoid as another Grave Pact/Dictate of Erebos-style effect, but I think theres some nuance here
Lifegain is one of the best-supported archetypes in Magic, and Heliod is the best lifegain commander thanks to the constant stream of value and combo potential
Summon: Primal Odin Speaking of win conditions, Summon: Primal Odin can be a black wincon as well
but despite wanting to commit a lot of creatures to the board, Boros is also a great color pair when it comes to removal