Leto improves Automatons to Warrior Automatons, which have more hitpoints and can regenerate.
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—In-game description in Retold
Hephaestus Revenge is an Atlanteanmyth technology in Age of Mythology: The Titans that is available to worshipers of Leto and can be researched at the Temple. Once researched, it upgrades Automata into Warrior Automata, increasing their hit points by +30% and giving them the ability to regenerate at 0.5 hit point per second.
Hephaestus Revenge costs 100 gold, 10 favor and takes 40 seconds to research. The regeneration granted to Automata is 0.5 hit points per second.
Mythology[]
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During the god Hephaestus' exile from Olympus, the lame smith was more than willing to offer his services to the highest bidder - and if he could serve the enemies of the family that had rejected him in the process, so much the better. Hephaestus taught the Atlanteans many interesting tricks; among them was a smelting technique that dramatically improved the longevity of their mechanical servants, the Automata.