But Golems are zenith craft!
Photon lances are spiretech
But Death Rays are universal!
If the Devourer Golem has been going around for however many years since AIWC, who's to say it didn't evolve the ability? Especially given that the Zenith are supposed to be a race of 3D printers. It could even make sense lore-wise. The Devourer Golem had been in our galaxy away from the spire for however many millennia, so it just used an attack that it was programmed with/was used by races it already encountered (eated
). Which makes sense, since its attack uses the minor electric ammo sprite. During AIWC, it had lots of Spire fleets to munch on, either as it was just passing through, or maybe the Spire organized an ill-fated monster hunt afterward. And it realized, 'Hey! These photon lances are pretty nifty! Maybe I should start using them!'
And thus the Spire became responsible for the three greatest scourges to the galaxy. (AI core, Dark Spire, and Cookie Monster)