Dusky Trap is a machine in Glacier's Laboratory, a mod for The Binding of Isaac.
Cannot be destroyed.
Can only be spawned by using any Dusky Tarot Card and holding the button that uses the card.
Instead of interacting with Isaac, these traps can only be activated by enemies that move onto them, this includes flying enemies. When triggered, the trap will activate various effects depending on the card that is used to spawn it.
Once triggered, The trap flips back after 15 seconds. Then, it has a 33% chance to turn idle and can be triggered once more, otherwise it is permenantly deactivated.
Check out each Dusky Tarot Card for more details about the effects it can active.