Overview
- Stemming the Tide - Hero is a Tier 5 Solo Challenge for heroes as part of the Deluge episode.
- Access to the Challenge requires a Combat Rating of 210.

Story
- Mera has called upon you to help the Flash defend the CCPD against an attack from Starro. If Starro takes over the energy grid at the CCPD then it will grow too fast to control and overrun all of Central City!
Characters
- Flash (Barry Allen)
- Mera
- Ocean Master
- The Rogues
- Captain Cold
- Mirror Master
- Trickster
- Weather Wizard
- Juvenile Starro
- Mature Starro
- Starro Spore
- Atlantean
- Police Officer / Controlled Police Officer
- Prisoner / Controlled Prisoner
- Brine Hatchling
- Brine Hulk
- Deep Sea Guardian
- Seahorse Statue (Vendor)
- Team Lockers (Vendor)
- The enemy combat rating is 235.
Related article links (17)
Flash (Barry Allen) · Mera · Ocean Master · The Rogues · Captain Cold · Mirror Master · Trickster · Weather Wizard · Juvenile Starro · Mature Starro · Atlantean · Prisoner · Brine Hatchling · Brine Hulk · Seahorse Statue (Vendor) · Team Lockers (Vendor) · combat ratingWalkthrough
- Inside the CCPD, you must help the flash clear Starro out. You do so by freeing controlled police officers and prisoners, and destroying Starro spore hatcheries. You then meet The Flash in the detention wing, Where The Rogues are being detained. Flash defeats Atlanteans, but he is then captured and turned into Controlled Flash, the first boss of the Solo. At certain point of the fight, you have to free one of the Rogues to help you. A starro will latch onto their cells and gain power from them. Destroy them before they do so.
- Part 2
- Mera appears and recognizes the armor of the Rogue atlanteans. She then tells you to follow her to an Ancient Atlantean temple to confront who's behind the entire invasion. It is revealed to be Ocean Master, Aquaman's brother who seeks to rule atlantis. After an arguement, the fight against Ocean Master begins. After he is defeated, Mera cuffs him and says he will inform Aquaman about Ocean Master's betrayal at Spindrift Station. And that's the end of the challenge.
Rewards
- Source Marks, Loot Items
- Loot:
- Event related gear
- Chance for event related R&D Plan
- Chance for event related Base Items
- Deluge: Small Treasure Box
Briefings and Investigations
Feats
- Manual Override: During the CCPD portion of the Story Mission (Normal), in a single run, shut off the power on all cell doors while the Starro spores are feeding off the energy grid (25 Points)
- Patience is a Virtue: During the CCPD portion of Story Mission (Normal), in a single run, defeat all four Supercharged Starro in a single instance, after they have completely drained the energy on the cell doors (50 Points), grants title: the Patient
- Plug the Pool: During the Atlantean Temple portion of the Story Mission (Normal), in a single run, plug each of the moon pools within 15 seconds each (25 Points)
- Sparkle, Sparkle, Little Starro: During the CCPD portion of the Story Mission (Normal), in a single run, destroy each of the smallest Starro spores feeding on the energy grid before it grows in size (10 Points)
- Temple Throwdown: During the Atlantean Temple portion of the Story Mission (Normal), in a single run, defeat at least 30 enemies that emerge from the moonpools (25 Points)
Trivia
- The walk-in version of this instance is not attached to any feats.
- Chronologically, the first part of the challenge comes before all the other Starro instances, but the second part takes place after Starro: The Threat Below.
- After escaping prison, the Trickster and Weather Wizard go controlled by Starro and can be found at Central City Starro Deluge Zone as part of the Fallen Stars mission.
- Black Lightning and Power Girl are mentioned in reports in the police station. Black Lightning is one of the iconics available as part of the Fallen Stars mission in the Central City Starro Deluge Zone, while Power Girl is one of the possible bosses in the Starro: Invasion! alert.
- A note found with the Starro Specimen - ST-2 on the desk my the metal detector contains the results for the tests performed in the mission Applied Science.
