Want to right down my custom Necron Weapons just so I have it somewhere.
Here are some of my old ideas, and one new one.
Anti-Plasma Weaponry/ Hyper cooling weapons- Similar to Plasma guns of the Imperium except instead of Heating a target they cool it to instantly on impact to absolute zero, the process is rather pseudo-sciencey as I can't back it up, but the best I can say is it fires an inert gas cooled below absolute zero, to where the particles experience negative activity, as heat is a particles movement and vibrations, These particle are experiencing a negative enrgy excitement, so Anti-Heat essentially. Upon contact with normal excited matter, it rapidly cools to absolute zero and environmental factors cause sever shock to the surface affected, as it experiences normal temperatures around it, the surfaces affect(Armor, Flesh, ect.) Begin to normalize, rupturing and bursting apart in icy fragments. If given the same stats as a plasma gun, it would probably need to have a gets hot rule(Cold in this case) so maybe something a tad bit less powerful but close enough, and fires more shots. Has a Heavy version, similar to Plasma cannon.
Before the NewCrons had a sniper rifle, I had invented my own, the Particle Whip Rifle for a Unique sniper unit I invented. It works exactly like the monolith particle whip, except smaller scale, but better range. Has an Anti-Vehicle shot for higher pen but lack of blast radius for a more condensed armor cracking blast, or a small blast shot, maybe like a few grenades in size, enough to hit a few units in one shot, good for taking out light to heavy infantry.
I had an even more powerful sniper rifle weapon, a Heavy Anti-Matter Projector, but it seems GW mad new ANti-matter weapons for the crons as ANti-infantry weapons which I find strange, as anti-matter is pretty volatile stuff. Anyways, not sure if I should keep it as it was a more Anti-Heavy Vehicle rifle, or I should just meld that with the previous rifle cause of the two firing modes. Probably the latter.
My newest idea was of something I was going to call the Sanitizer, which would be a Necron equivalent of a flame thrower. (While the Newcrons do have Melta like weapons with their heat rays, I think they had a firing mode that was similar to a heavy flamer in a wide cone, not sure though.) Anyways, my Sanitizer would be optional equipment for standard warriors to equipt, it would fire Hyper Lethal amounts of radiation of all kinds, known and unknown in flamer like cone, it would have the additional effect of irradiating any unit that survives a hit and on the opponents turn cause the unit to recieve a low strength hit with maybe decent armor pen or not to itself or units close to it(For TT maybe an inch to the base of the unit, so great if it is a large dense unit) That was my thought on it, would be sure how to balance the stats though. I also would have a heavy version, and maybe make it an Option to equipt on a monolith on its sponsons, instead of its Gauss weapons.