The electric Magma Worm: five times the health and five times the damage. Only shows up at very high difficulty.

| In-game title | The Reminder |
| Type | Teleporter boss |
| Health | 12,000 (+3600 per level) |
| Base damage | 50 (+10 per level) |
| Armour | 15 |
| Where it spawns | Stage 3: Damp Caverns, Iron Alluvium, Iron Auroras, Rallypoint Delta · Stage 4: Abyssal Depths, Conduit Canyon · Stage 5: Helminth Hatchery, Sky Meadow. |
Same as the Magma Worm, but the screen turns blue and he shocks you.
How to dodge it: Step out of his path.
When leaping he spits electric orbs that release another shock when they land.
How to dodge it: Get away from where he lands and fight from range.
When it is the teleporter boss, each green item it drops has a 15% chance to be its boss item instead: Charged Perforator.
Charged Perforator
10% of your hits call down a strong lightning bolt. Each extra one, more damage.
Stacking: Each copy adds the same, no cap.
Watch out: It deals 500% of the hit, not base damage. The strike is delayed and fast enemies can dodge it.

When it is the teleporter boss, each green item it drops has a 15% chance to be its boss item instead: Charged Perforator.
Stage 3: Damp Caverns, Iron Alluvium, Iron Auroras, Rallypoint Delta · Stage 4: Abyssal Depths, Conduit Canyon · Stage 5: Helminth Hatchery, Sky Meadow.
12,000 base health, plus 3600 per enemy level. Armour: 15.
Sources: the Risk of Rain 2 wiki (each boss page and Module:Enemies/Data, read on 31 October 2026) and the game's own text. The explanations are our own. Icons: Risk of Rain 2 (Hopoo Games / Gearbox).