What you’re seeing now is the…laser used to aim my battleship’s six 425mm railgun turrets. At this altitude, the gravity of your planet will augment the standard launch velocity of each solid projectile to speeds well beyond operational specifications, enough to obliterate anything within half of a kilometer of the impact site.

Anything between that location and two kilometers…will suffer a worse fate, as the antimatter suspended in each shell escapes its containment field and expands in a random dispersion pattern, colliding with the ambient normal matter on the ground – buildings, trees...children...everything.

Whatever these particles touch will experience matter disassociation on an atomic level as, piece by piece, they are reduced to unidentifiable residual particles.

With a single thought, I can reduce your entire city to a smoldering crater; the boiling wind rushing in to replace the void left behind will be laced with dust particles that were once the bodies of everyone you know and love.