Scenario = Earth is being invaded (DC or Marvel) by an alien force that is so ridiculously high in number that it completely blocks out the sun and causes a night-like appearance in the sky. Millions of either alien craft or alien creatures fill the sky.
What hero's (or villain's) attack would take out the largest number of them at a single instance?
Obviously this is not a punch or such.
Hal Jordan's ring
Black Bolt's shout
Galactus cosmic beam
Shouldn't have mentioned Galactus or anyone completely insane powerful. I tend to notice when the OP uses someone like big G as an example to an answer to a question a flood of people will just mirror that example as an answer. Sooo instead of getting interesting answers your subjected to the same group of characters being mentioned a dozen times.
Hope that made sense as I'm working so I'm not really watching what I'm writing but yeah. Some guidelines like earth based heroes and the such could of been cool like a 'we must defend the earth' type deal instead of just superboy prime heat vision or cosmic -insert name of badass here- farts and kills the sun along with the aliens type deal.
I'm still thinking of my answer. I'll check back in later.
__________________ "Compounding these trickster aspects, the Joker ethos is verbally explicated as such by his psychiatrist, who describes his madness as "super-sanity." Where "sanity" previously suggested acquiescence with cultural codes, the addition of "super" implies that this common "sanity" has been replaced by a superior form, in which perception and processing are completely ungoverned and unconstrained"