450px-Cursing_Stone, you test the powers of the cursing stone? The first ever uncovered in Scotland, it supposedly can cast a spell when it is rotated while the proper prayer is spoken. BBC reports:

A stone discovered by chance in an old graveyard on the Isle of Canna is Scotland’s first known example of a bullaun “cursing stone”, experts have revealed. Dating from about 800 AD, the stones are associated with early Christian crosses – of which there is one on the isle.

It was later found to fit exactly into a large rectangular stone with a worn hole which was located at the base of the Canna cross. Traditionally, the pilgrim would recite a prayer while turning the stone clockwise, wearing a depression or hole in the stone underneath.

Katherine Forsyth, an expert in the history and culture of early Celtic-speaking peoples, based at the University of Glasgow, described it as an “amazing find”.