Having a consistent way to not only create a second combat phase but also untap all the creatures you control for a measly four mana is a phenomenal pairing, especially when used as a Commander to bring her back into the fight after being targetted
I sunk all of my free Magic Arena wild cards resources into a Boros Mentor deck, just to find out that the mechanic isnt all that great in constructed
Interestingly, most of the battles in this set dont work particularly well for the Phyrexians
Find your path through the multiverse using only favorite characters and their most iconic spells and artifacts, or create a theme deck with a narrative that makes sense only to you
It doesnt get much sweeter than that
This could be by way of getting tons of ETB triggers, death triggers, or just swapping out your small creatures for your big ones