Prometheus
- Base damage
- 390–450
- At max upgrade (level 20)
- 450–590
- Effects
- Unlocks the 4 effects
- Effects work with
- Any number equipped
- Equip on
- Ship only
Prometheus
Prometheus lasers can unlock four effects: shield recovery, health recovery, crits and arson. Prometheus PLUS hits harder and can upgrade each of those effects.
The two lasers
Prometheus PLUS
- Base damage
- 600–650
- Laser upgrades
- Not available
- Effects
- Uses and upgrades the 4 effects
- Effects work with
- PLUS in every laser slot*
- Equip on
- Ship only
*Crit is the exception: it works with any number of PLUS lasers equipped. PLUS lasers don't unlock new effects, so you need to get them with regular Prometheus lasers first.
All effects
Below, N is the number of lasers you have equipped that share the effect.
Shield recovery
Each shot restores shield based on the combined damage of your Prometheus or PLUS lasers.
- Effect
- 30% of that damage
- Upgraded
- 45% of that damage
Health recovery
Each shot restores health based on the same combined damage. It doesn't work with SAB ammo.
- Effect
- 25% of that damage
- Upgraded
- 35% of that damage
Crit
A chance on each shot to deal extra damage. N counts Prometheus, PLUS and LR-5 lasers.
- Effect
- 5% chance, +(100 + N)% damage
- Upgraded
- 8% chance, +(150 + N)% damage
Arson
Each shot has a 1% chance to set the enemy on fire. While it burns, it loses (N ÷ 2)% of its current health every second. N counts Prometheus, PLUS and LR-4 lasers, so 16 lasers burn 8% per second. Some bosses are immune.
- Effect
- Burns for 3 seconds
- Upgraded
- Burns for 4 seconds
In gates and Spartan fights, PLUS lasers don't deal arson damage.
How to unlock effects
- Fill every laser slot with Prometheus lasers and don't use SAB ammo.
- Keep shooting. Every shot has a 1 in 200,000 chance to give you a random effect, once per fight at most.
- Watch the progress bar. Tap the info button on the laser in Equipment to see your progress towards a guaranteed roll, which takes 400,000 shots.
Unlocked effects are permanent, and you keep them when you change lasers.
Effect chances
| Normal days | 3rd of the month | |
|---|---|---|
| Chance per shot | 1 in 200,000 | 1 in 100,000 |
| Shots for a guaranteed roll | 400,000 | 200,000 |
The Prometheus Upgrade event runs on the 3rd. The guaranteed roll picks one of the 4 effects at random, so you get nothing if it lands on one you already have. Only regular and Spartan fights add to the progress bar.
Where you can roll an effect
| Fight | Needs | Progress |
|---|---|---|
| Regular fights | All slots Prometheus | Yes |
| Spartan fights | All slots Prometheus | Yes |
| Gates | 16 Prometheus equipped | No |
How to upgrade effects with PLUS
- Unlock the effect first. Only effects you already own can be upgraded.
- Fill every laser slot with Prometheus PLUS.
- Shoot in regular fights. Each shot has a 1 in 200,000 chance for each effect you haven't upgraded yet, or 1 in 100,000 on the 3rd of the month. There's no guaranteed roll for upgrades.
Upgrades are permanent too, and they also apply when you use regular Prometheus lasers. The shield, health and arson upgrades improve LR-2, LR-3 and LR-4 as well, and the crit upgrade improves LR-5.
How to get the lasers
Prometheus
| LR Lasers (level 16) | Combine 3 LR-5 lasers |
| Crystallit Market | 250 Crystallit |
| Level rewards | 1 at level 27 |
| Other | Quests, clan boss tasks and shop packs |
Combining starts at 0% success, or 10% with Premium. Each boost adds 10% and raises the Deltin cost by 10%, from 500 up to 1,302 for 100%. If it fails, you lose the 3 LR-5 lasers and the Deltin.
Prometheus PLUS
| Assembly | 1 Prometheus, 30,000,000 uridium and 3,500 PLUS drafts |
| Crystallit Market | 400 Crystallit |
| Other | Level pass, Eternal Gate tasks and shop packs |
Prometheus PLUS drafts come from clan bosses.
Upgrading Prometheus damage
Regular Prometheus lasers can be upgraded up to level 20. Each level adds +3 minimum and +7 maximum damage to all of them. The first level costs 600,000 uridium and 2 upgrade parts. Each next level costs 750,000 more uridium and 1 more part, which comes to 154,500,000 uridium and 230 parts in total. Parts come from Spartan fights and Up-boxes.
Odysseus bonus
Your Prometheus effects also raise the base damage of Odysseus lasers:
| You own | Odysseus damage |
|---|---|
| No effects needed | 650–700 |
| Shield and Health | 750–850 |
| All 4 effects | 900–950 |
| All 4, plus Shield and Health upgrades | 1,000–1,050 |
| All 4 effects and all 4 upgrades | 1,100–1,150 |