Uses normal Chariot attacks, plus Brainjack. Brainjack is single target Charm plus DoT (-25 HP/tick) for 60 seconds.
Silver Sea Remnants: Goes into "Brainjack mode" for ~90 seconds every 25% HP, or after a certain time has elapsed (~3 minutes), whichever comes first. Can use Brainjack to charm players 5 or more times during this timeframe.
Floor 3: Spawns from a stationary Archaic Rampart which appears in the large east or west room after defeating one of four Archaic Gears spawned from Archaic Ramparts in the corners of the rooms.