A Plasma Beam Cover is a new type of door obstacle in Metroid Dread. They are green energy shields over Power Beam Doors, which can only be destroyed with the Plasma Beam. They first appear in Elun, where the Plasma Beam is acquired. One blocks the door out of the room where the item is obtained, and another guards a shaft with rubble. The similarity of Plasma Beam Covers to Super Missile Covers, which are also green, may cause confusion at first.
They are similar to the Red Doors in Metroid Prime and Orange Doors in Metroid Prime 3: Corruption, which can only be opened with the Plasma Beam. However, Plasma Beam Covers are destroyed by one shot, while Red Doors and Orange Blast Shields do not revert to Blue Doors when shot, and must always be opened with the Plasma Beam. In the case of Corruption however, beams stack, rendering this a non-issue.