Brain Storm is PvE and Conclave 
Grakata mod that briefly increases Ammo Efficiency on a headshot.
Stats[]
| Rank | Ammo Efficiency | Duration | Cost |
|---|---|---|---|
| 0 | +25% | 0.125s | 10 |
| 1 | +50% | 0.25s | 11 |
| 2 | +75% | 0.375s | 12 |
| 3 | +100% | 0.5s | 13 |
Acquisition[]
- This augment may be rewarded after a Conclave match, regardless if the player wins or loses the match in question.
- Beginning in Series 3, this augment can be purchased as a Nightwave Cred Offering for
20.
Drop Locations[]
Mission Drop Tables
| Mission Type | Source | Rotations or Drop Table |
Chance[1] | Quantity[2] | Avg. per roll[3] | Star Chart Nodes |
|---|---|---|---|---|---|---|
| Annihilation | Annihilation (Conclave) | A | 2.48% | 1 | 0.0248 | |
| Cephalon Capture | Cephalon Capture (Conclave) | A | 2.48% | 1 | 0.0248 | |
| Lunaro | Lunaro (Conclave) | A | 2.48% | 1 | 0.0248 | |
| Team Annihilation | Team Annihilation (Conclave) | A | 2.48% | 1 | 0.0248 |
Enemy Drop Tables
| Enemy | Drop Table Chance[4] | Item Chance[5] | Chance[6] | Expected Kills[7] | Quantity[8] | Avg. per roll attempt[9] |
|---|
Sourced from the official drop table repository. See Module:DropTables/data to edit on the wiki.
Notes[]
- Can also be equipped on the Prisma Grakata.
- Ammo Efficiency means the Grakata will not consume ammunition when firing; at full rank, the Grakata will not consume ammunition at all if you reliably score headshots and keep the buff going.
- Can be used with Wild Frenzy. However, ammunition will not be refunded if Brain Storm activates during the burst.
- Additional headshots will refresh Brain Storm's duration.
Patch History[]
Update 27.4 (2020-05-01)
- Conclave Mods Converted to PVE:
The following Conclave Mods have been converted/balanced to PvE Mods! If you already own these Mods they will automatically be available in your Arsenal. You can still obtain these Mods via Conclave, but will also be added to Nightwave Series 3: Glassmaker Cred Offerings.
- Brain Storm (Grakata): On Headshot: +100% Ammo Efficiency for 1s.
See Also[]
- Skull Shots, a similar mod for the Viper.
| Ammo Mods | |
|---|---|
| Sentinels |  Ammo Case
|
| Reserve Ammo | Ammo Drum • Shell Compression • Trick Mag
|
| Magazine Capacity | Ammo Stock • Atomic Fallout • Magazine Warp ( Prime) • Shotgun Elementalist • Slip Magazine ( Prime) • Wildfire • Ice Storm • Tainted Mag • Tainted Clip • Burdened Magazine
|
| Ammo Mutation | Rifle Ammo Mutation ( Prime) • Sniper Ammo Mutation ( Prime) • Shotgun Ammo Mutation ( Prime) • Pistol Ammo Mutation ( Prime) • Arrow Mutation • Vigilante Supplies
|
| Ammo Pickup | Amalgam Daikyu Target Acquired • Rifle Scavenger • Shotgun Scavenger • Sniper Scavenger • Pistol Scavenger
|
| Ammo Efficiency | Skull Shots • Brain Storm
|
| Ammo Refund | Blood For Ammo • Wild Frenzy
|
| PvP | Maximum Capacity • Loaded Capacity • Full Capacity • Hydraulic Gauge • Hydraulic Chamber • Hydraulic Barrel • Draining Gloom
|
- ↑ Chance to roll item within drop table
- ↑ Amount rewarded on successful roll
- ↑ (Quantity × Chance)
- ↑ Chance to roll drop table
- ↑ Chance to roll item within drop table
- ↑ (Drop Table Chance × Item Chance)
- ↑ (1 / Chance), see WARFRAME Wiki:Expected & Nearly Guaranteed Numbers for more details
- ↑ Amount rewarded on successful roll
- ↑ (Quantity × Chance), average item quantity on a roll attempt (successful or not)