will be useful, will serve
Si la abro hará tanto calor que solo servirá para atraer mosquitos.
If I open it, it will be so hot that it will only attract mosquitoes.
— Una segunda madre (2015)
Después de todo, es lo que les servirá cuando se casen.
After all, it's what will serve them well when they get married.
— स्वदेस (2004)
Pegarme no le servirá para entenderme.
Hitting me won't help you understand me.
— Caché (Escondido) (2005)