GBx midrange decks are most commonly associated with targeted discard spells like [c]Thoughtseize[/c], efficient removal spells like [c]Fatal Push[/c], powerful creatures like [c]Tarmogoyf[/c], and grindy planeswalkers like [c]Liliana of the Veil[/c]
None of these instantly wins the game, but all of them are a great boon to an artifact deck and can keep it running smoothly
Feldon of the Third paththe deck basically builds itself
Since each triggers again, you just keep putting -1/-1 counters on the tokens you create with Infestation, resulting in an infinite loop of losing one and gaining two, creating infinite tokens
Hitting someone before they can hit you is a key to winning any fight
This was one of the best combinations of flavor and gameplay mechanics that the Universes Beyond products have ever showcased in a precon