Asphyxiating Blackboard Erasers

Origin
The precise origin of these artifacts are unknown, but it is presumed to be either a punishing teacher, or a punished student.

Effects
When these two erasers are clapped together, it will produce a single, ever-growing cloud of chalk dust that will actively try to kill the victim via asphyxiation.

Collection
Collected by Arthur Nielson in 2001 from [REDACTED] elementary school, along with a cache of other artifacts.