Theorylytics

Grenade Fan

Used by Protea

Ability1
Energy25

Grenade Fan

Throw out grenades in an arc. (TAP) SHRAPNEL VORTEX Creates a slashing, staggering swirl of shrapnel. (HOLD) SHIELD SATELLITES Protea reconfigures Grenades to work as overcharging shield generators, protecting her, her allies and companions. When Shields break, a Satellite is destroyed to double minimum Shield Gate invincibility time.

Introduced in Update 28.0 (2020-06-11)

Ability stats

Strength
  • See in-game / wiki ability card for rank values
Duration
  • See in-game / wiki ability card for rank values
Range
  • See in-game / wiki ability card for rank values
Misc
  • Throw out grenades in an arc.

Info

  • Grenade Fan is Protea’s ability 1.
  • Throw out grenades in an arc.
  • Use it with the rest of the kit — especially Blaze Artillery, Dispensary — instead of casting it in isolation.
  • Ability Strength, Duration, Range, and Efficiency each matter differently; check Mod Scaling below before dumping all four.

Tips & Tricks

  • Read the battlefield first — cast Grenade Fan when it actually solves the room, not on cooldown habit.
  • Pair Grenade Fan with movement and energy economy so you’re not stranded after a big spend.
  • On Steel Path, confirm whether Grenade Fan still carries without strip, Viral, or a squad buff.
  • If you never press 1, it’s the first Helminth candidate on Protea.

Ability dossier · Grenade Fan

Verified 2026-07-22

Synergies

  • Grenade FanBlaze Artillery

    Use Grenade Fan to set up Blaze Artillery, or follow Blaze Artillery with Grenade Fan while enemies are vulnerable.

  • Grenade FanDispensary

    Use Grenade Fan to set up Dispensary, or follow Dispensary with Grenade Fan while enemies are vulnerable.

  • Grenade FanTemporal Anchor

    Use Grenade Fan to set up Temporal Anchor, or follow Temporal Anchor with Grenade Fan while enemies are vulnerable.

Mod Scaling

Strength

Improves Grenade Fan’s damage or effect potency where Strength is listed on the ability.

Duration

Duration is low priority on Grenade Fan unless an augment or lingering effect needs it.

Range

Range is usually dumpable on Grenade Fan unless you feel the hitbox is too tight.

Efficiency

Grenade Fan costs energy each cast — Efficiency (or strong regen) keeps the loop comfortable on long missions.

Priority

Stack the stats that actually move this ability’s needle, then Efficiency for uptime.

Mission Use Cases

MissionHow to Use It
Steel Path Survival / Defense / DisruptionTest whether Grenade Fan still clears or enables clear when enemies are dense and overlevelled.
Mobile Defense / ExcavationUse Grenade Fan to control or delete the swarm on the objective, then reposition.
Exterminate / Capture Speed RunsCast Grenade Fan only when it saves time — skip it on empty tiles.
Spy / Rescue / Quiet RoutesIf Grenade Fan is loud or forces combat, save it for after the vault; if it’s stealth-friendly, use it to stay safe.

Comparisons

  • VS

    Vs similar tools on other frames — Grenade Fan is tuned for Protea’s loop — don’t judge it as a standalone subsume without the rest of the kit.

Other Protea abilities