Title says it all, can an Engine of the gods take a weapon enhancing relic. The only melee weapon’s are the stegadons, but is it a mount or the unit? This is not named like “old blood on carnosaur” which very clearly specifies which is the hero and which is the mount.
I'd probably say you can't, or well it feels weird to pick em. Also, I don't think you'd really want to seeing as the EoTG isn't really a frontline unit given that you want it to be alive so it's engine actually works and need space to summon your guys into. Something defensive, utility focused or a ranged artifact seems better at first glance.
NO, you cannot. As you already know (but i will repeat it as this is a thread that could be viewed by anyone) by basic rules, the weapon relics cannot affect the attacks made by the Mount. (typical well known example: an Oldblood on Carnosaur can take a Blade of Realities but it will affect the weapon of the Oldblood, not the bite of the Carnosaur). in this specific case, the hero of the EotG is the "Skink Priest" we see in the keywords… the stegadon is the mount of the skink priest. The Skink Priest doesn't have any weapon, thus you simply cannot give a relic weapon to the WotG
Yeah, that's a thing that comes from WHFB. The priest is there to activate the Engine… the Stegadon is just a majestic beast that is strong enough to carry the ancient artefact.