This death ray doesn't even cost $90.
Eric Jacqmain's 5,800 mirror solar death ray, which he claims has the power of 5,000 suns, rang in at under $100 and it works pretty well. In fact, the 5' 9" destructive device (mounted on a satellite dish) is so powerful, despite the cost, that anything its focus immediately bursts into flame, including normally non-flammable materials like rocks.
The 19-year-old Indianian has plans for an even bigger set-up however, a death ray which will include over 30,000 mirrors, according to Gizmodo.
Watch Jacqmain lay waste to anything he hits with the ray below.