Your first thought is wondering why they're playing a Wrath of God and not a better board wipe, but then your second thought is how you're going to save your most important creatures from the devastation
Being able to attack on the turn you cast this zombie assassin, you will cause your opponent to lose board dominance and possible sacrifice one of their big creatures
If theyre actively doing these normal actions, youre growing River Song and damaging them
The nicest thing here is that youll usually get a good cost reduction to cast your big threat, particularly if one of your opponents has a Dockside Extortionist in play
His ultimate, which costs 12 counters , is effectively a board wipe and can lead to a swift victory though do make sure you can swing for lethal before activating it
Thanks to some combos with undying, you can do a lot with the Father of Machines if you dont mind getting your hands dirty