Main Reactor

Main Reactor is a room in Agon Wastes.

Layers
The spider ball tracks are nonfunctional during Samus's first visit, when she defeats Dark Samus.

Boss Strategy
A Power Bomb can be used to one-shot Dark Samus.

Alternate Escape
A bomb space jump can be used after defeating Dark Samus to leave the room without collecting the Dark Beam.

Missile Expansion
You can screw attack into either the entry or exit holes to collect the missile quickly, without needing to use Spider Ball or Boost Ball. Morph Ball Bombs or Power Bombs can destroy the glass covering the expansion