I was actually thinking of the armor effects, I think there should be one of the old ones, (Everyone can vote and that one can be given to everyone with Halo 4). But also new ones. Like for example: No shield armor effect could be the lights on the shield flashing like they do when you lost the shield. Or like the custom blood one people made in Halo: Reach by standing inside a kill ball with invulnerbility activated. This is just my opinion. But there would obviously be even more.