The ability to ignore black mana and instead use your life as a resource means that you can grant Krrik shadow via Dauthi Embrace for only 4 life, cast and attack with Skithiryx, the Blight Dragon for three mana and 6 life, while also casting your Whip of Erebos, Phyrexian Arena, and Grey Merchant of Asphodel in rapid succession
That deck is already a force, but perhaps a variant could exist that is just W/B
That being said, however, it is missing one key detail that could make it its own deck
"It depends which version you want," Lyles said of the cards
Formidable Whenever you attack, if creatures you control have total power 8 or greater, target attacking creature you control fights up to one target creature you don't control
You can banish 3 cards from your Extra Deck face-down, then target 1 face-up monster on the field