In vanilla Minecraft, Guardians (and Elder Guardians) can shoot lasers. I would like it if that was an action that applied to Guardian and Elder Guardian morphs. Basically, by being morphed as a Guardian or Elder Guardian, you can shoot a laser by pressing the action key. Note that just like a regular Guardian, you have to charge up the laser by holding the action key and remaining fixated on the target for several seconds before it will deal damage on your behalf.