“You seek power, you pay in blood.”
This item's acquisition and usage is limited to player versus player missions.
Draining Gloom is Conclave-exclusive 
Despair mod which causes Energy-draining explosions, but reduces Magazine Capacity and Ammo Maximum.
Stats[]
| Rank | Proc Chance | Magazine Capacity | Ammo Maximum | Cost |
|---|---|---|---|---|
| 0 | +25% | -15% | -15% | 10 |
| 1 | +50% | -30% | -30% | 11 |
| 2 | +75% | -45% | -45% | 12 |
| 3 | +100% | -60% | -60% | 13 |
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.
| 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)