The only thing missing is a "Flood"gun, that is a gun that combines a supply of Flood infection forms in a handy launcher(be it Covenant or Human or maybe both mixed together) that allows you to infect enemies with this nasty "bug".
Why you ask? Well what if they found a way to alter the Flood in a way that makes them have a short lifespan(say 1-3 minutes) and not attack the one holding the weapon(sorta like in Halo 2 you have the "Ant lion" sent grenade thing that allowed you to make them attack targets you wanted). It might have sort of secondary function that did this "send" command allowing you to send a pack of attack forms(the other mod would be that only attack forms would be created not bursting or more infection forms, the infection form used to infect would be used up and not be able to reacquire another host) ahead to wither the fire for you. Reloading(if possible or allowed) might be done from going to beaten attack forms(those not created by the weapon of course) and scooping up the ammo.
Why you ask? Well what if they found a way to alter the Flood in a way that makes them have a short lifespan(say 1-3 minutes) and not attack the one holding the weapon(sorta like in Halo 2 you have the "Ant lion" sent grenade thing that allowed you to make them attack targets you wanted).
It might have sort of secondary function that did this "send" command allowing you to send a pack of attack forms(the other mod would be that only attack forms would be created not bursting or more infection forms, the infection form used to infect would be used up and not be able to reacquire another host) ahead to wither the fire for you.
Reloading(if possible or allowed) might be done from going to beaten attack forms(those not created by the weapon of course) and scooping up the ammo.
Sound like a weapon you want to have?