Complex sentence: After researching the secrets, you'll be able to summon a Titan gate anywhere within your line of site, once it is placed, you must task villagers on releasing the titan (have military units around to defend the titan gate).
Split into simpler sentences: After researching the secrets, you'll be able to summon a Titan Gate anywhere within your line of site. Once it is placed, you must task villagers on releasing the Titan (have military units around to defend the Titan Gate).