User blog comment:Godzillavkk/Star Craft 3 story ideas./@comment-157464-20190114003759/@comment-157464-20190115153037

Keep in mind -- Stukov was held captive in Skygeirr Station for many years and experimented on by a xel'naga. I assume it was during that time that he learned that he could deactivate the temples by channeling psionic energy into them.