Who Phlox is
Phlox is a 4-star Federation Science officer in Star Trek Fleet Command. He belongs to the Enterprise NX-01 crew group with Jonathan Archer, T’Pol, Trip Tucker, Hoshi Sato, and Shran. His main job in a crew is to shut down enemy Critical Hit Chance on the first round of a fight, which makes him a useful bridge pick against hostiles and against other players.
One thing to know up front: Phlox has no captain ability. The card slot is labeled “Chain of Command” but the description itself reads “This Officer does not have a Captain’s Maneuver.” Equip him as captain and the ship gets nothing. He earns his keep from his officer ability and his below-decks ability, not from the captain seat.
Star Trek background
Doctor Phlox is the Denobulan chief medical officer of the Enterprise NX-01 in the Star Trek: Enterprise series, played by John Billingsley. He joined the Interspecies Medical Exchange before 2149 and was working at Starfleet Medical in San Francisco when Captain Jonathan Archer recruited him for the NX-01’s first mission. His treatment of a Klingon courier named Klaang in “Broken Bow” helped justify Earth’s leap into deep-space exploration.
Phlox stayed with the ship through the four-year mission that ended in 2154 and continued serving into the founding of the Federation in 2161. He is curious, principled, and not shy about pushing back on Starfleet medical orthodoxy when he believes a higher rule applies. He keeps a sickbay menagerie of living specimens, from Pyrithian bats to Regulan bloodworms, and uses them in treatments that the rest of the crew finds odd.
Role in STFC
In game, Phlox is a defensive support officer. His officer ability fires at combat start against players and hostiles and reduces the opponent’s Critical Hit Chance for the round window. He is useful as a bridge officer on a ship that wants to avoid spiky incoming damage, especially against crews that lean on Officer Abilities tied to crit chance.
His below-decks ability is built around the Borg Cube and the Cube’s Cutting Beam. That is a niche but real use case if you fly the Cube.
A few practical notes before you build him into a crew:
- His Critical Hit Chance reduction does not trigger at Armadas, Assaults, or Station Combat. Plan for that and use him where it pays off.
- He is officer-only. Pair him with a real captain ability and let Phlox sit in a bridge slot.
- The below-decks effect only applies on the Borg Cube and only when he is assigned to a below-decks slot.
Captain ability
Phlox’s captain slot is labeled Chain of Command but has no in-game effect. Putting him in the captain seat is wasted potential, and the game itself flags this when you build the crew. Treat the captain ability as nonexistent and put a real captain in front.
Officer ability
Denobulan Threat Response
At combat start against players and hostiles, Phlox reduces the opponent’s Critical Hit Chance for 8 rounds. The reduction scales with his promotion rank, climbing from a smaller cut at Ensign I to a full cut at Commander V. As of the latest game data, the rank-5 cap on the reduction is 100%, which effectively shuts off crit chance from a single source for the duration.
The effect only applies in player versus player combat and against hostiles. It does not fire at Armadas, Assaults, or Station Combat. Officer Abilities also require Phlox to be assigned to the bridge, not below decks, for this one to activate.
Below-decks ability
Specimen Cataloging
When Phlox is assigned to a below-decks slot on the Borg Cube, he improves the efficiency of charging the Cube’s Cutting Beam. The benefit scales with his rank, with the top end reaching the full bonus at Commander V as of the latest game data. This only matters if you are flying the Cube and you have a below-decks slot to spare. If you are not on the Cube, the ability does nothing.
Where Phlox shines
Three situations where he earns the slot. The first is anti-crit defense on the bridge. When you expect to face a crew that leans on Critical Hit Chance to spike damage on round one, Phlox flattens that opening burst. The second is hostile grinding where survivability matters more than raw damage. Mid-game players running heavy survey or hunting ships through hostile-rich systems can use the crit drop to take less unpredictable damage. The third is the Borg Cube below-decks slot. Players who fly the Cube and want a faster Cutting Beam charge have a clear home for him below decks.
He is not a damage officer and he is not an economy officer. If you need a captain or a hostile-killer, pick someone else.
How to get Phlox
Phlox is a Federation Science officer, so he sits in the same recruiting and progression flow as other 4-star Federation cards. The most reliable way to add or rank him up is through the Federation Recruit Token store and through events that grant officer shards as rewards. STFC rotates which officers show up where, so check the current store offerings and event rotations rather than assuming a fixed source.
Each rank costs more shards than the last. The total to take him from recruitment through rank 5 is 1,500 shards, with the largest single chunk falling between rank 4 and rank 5.
Synergies and the NX-01 crew
Phlox shares a synergy group with the rest of the Enterprise NX-01 cast: Jonathan Archer, T’Pol, Trip Tucker, Hoshi Sato, and Shran. The group is small, evenly themed, and built around early Enterprise-era characters. If you are building a crew that already leans on Archer or T’Pol, Phlox is on the short list of officers who share that flavor.
Phlox himself is a Science-class officer, which matters for class-synergy bonuses on the captain seat when paired with the right captain. Concrete class-synergy percentages for his card are not currently exposed in the publicly available source data, so treat the synergy pattern as conceptual rather than as a fixed number to plan against.
Character traits
Phlox unlocks three character traits as you level him: Doctor, Charismatic, and Charming. The trait tree opens in that order, and higher levels are gated behind XP costs that climb as you go deeper. The first traits cost is modest. Later levels of Charming run into tens of thousands of trait XP. Invest in traits on the officers you actually use, not the ones sitting in your roster.
Frequently asked questions
Is Phlox any good in STFC?
Phlox is a niche but real officer. He is not a tier-list captain pick and he is not a top hostile damage dealer. He is a useful bridge slot when you want to shut off enemy Critical Hit Chance on the first round of a player or hostile fight, and he has a clean below-decks home on the Borg Cube.
Where do you get Phlox shards?
Phlox shards come through Federation officer sources. The exact route depends on what STFC is running at the moment, so check the recruit token store and current event rewards before planning around him.
Can Phlox be a captain?
Technically yes, the captain slot will accept him. In practice, no. His captain ability has no effect, and the description even says so. Put a real captain in front and use Phlox on the bridge or below decks.
Does Phlox work at Armadas or Station Combat?
His Critical Hit Chance reduction does not trigger at Armadas, Assaults, or Station Combat. He is built for player versus player and hostile combat. Below decks, his Cutting Beam charge bonus only fires when his ship is the Borg Cube.
Is Phlox worth promoting to rank 5?
If you are actively flying him in a crew that benefits from the crit-chance shutoff, the climb to rank 5 is worth the shards because the reduction scales hard at the top end. If he is sitting in your roster unused, promote a different officer first.
Closing thought
Phlox is a sharp tool for a specific job. He punishes crews that rely on crits, he has a clean home on the Borg Cube, and he carries one of the more popular pieces of Trek canon onto your bridge. Just go in with the captain slot question already answered, because that part of his kit is not coming.