[member="Ryker Tal'verda"]
What about (And Yes, I am going OP as hell here, bringing things from another universe too) the Halo Array? Just one will wipe out all life, no matter what, in a 25k light year radius. Only a Forerunner Shield World could stop the Halo's light, and those are VERY rare.
Then again, I would kill myself in the process, as I would be ON the station as it fired.