This could be by way of getting tons of ETB triggers, death triggers, or just swapping out your small creatures for your big ones
Obvious riff on Recurring Nightmare, there's some really strange abuse cases with cheapy creatures that cause sacrifices, or loops that generate energy, or cheat out a bunch of energy generating creatures
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
There's gold or dragons fire at the end, so enjoy the journey
Oracle was a key component of the Inverter of Truth decks in Pioneer and has given some niche combo decks in older formats new life
Interestingly, most of the battles in this set dont work particularly well for the Phyrexians