Actually it depends if you want to guide the laser after commanding to launch it.
Assuming you know your way around with the codes.
You Could.
Like what Pakhibirdy said.
You can use Artillery Barrage as your base for the Special Power.
-Things to do:
--Provide all the necessary Sciences, Special Powers, OCLs and Buttons for it.
--Make a new "Artillery Shell" make it have a ParticleSystem that is similar to that of a Particle Cannon.
--Update the OCL with the new shell and other details along with it.
Or.
You can use the Spectre Gunship as the base if you want to guide the laser after shooting it.
Just make sure the Spectre Gunship isn't seen or there's no model for it and also make it Fly a really high altitude.
-Just make a Laser Weapon for it and remove the extra guns.
The only problem is when you accidently lose control over the "Spectre Gunship".
Death Label:
Reduced back to 3 main factions(and a couple of extras).
Each faction can choose a(or all of them) tech-tree via General's Powers.
Angel Wings: Jets and Anti-Air, Helicopters and Missiles, Hovercraft and Lasers
Red Skulls: Armor Division, Mecha Armada, Drone Swarm
Earth's Saviors: Air Raid, Homeworld Security, Stealth