95. I may not use cee-fractional strikes to eliminate the Necron base on the planet I'm trying to save.
96. I may not use kinetic strikes on said Necron base either.
97. In fact, I may not use any sort of orbital strike except for the weapons on our starship.
98. And no, I may not place engines underneath the powerful force field surrounding the Necron base and launch it into the local sun.

Cracking the planetary crust isn't that bad a thing, right?