I think what he meant is equipment to make offspring
A factory? There have to be some in order for the elfroids not to succumb to damage and attrition, and for him to have the technological base to upgrade the exteriors...
became a legend as the founder of the Holy Elfroid Hylodom, his tale wistfully told to this very day.
"Holy Elfroid Forest Kingdom", but it doesn't sound quite as nice in English (being excessively long), so this translator combined "hylo-" (forest-) with "-dom" to get "Hylodom", which also doubles as a pun with "halidom".