devilry

Mischief.

Their newfound devilry : prank-calling local businesses.

Wickedness; cruelty.

"The Master's Society wishes to overturn the world order into his hands by devilry and chaos. There is good news that Mr. Stevens is repentant and under our employ and gave us a significant store of antidote for the violent toxin. We can dose the MPs."

An action performed with the help of a devil; witchcraft.

An act of such mischief, wickedness, cruelty, or witchcraft.

[…] pranks and devilries which turned slowly more unpleasant.