Shut Down the Machine

Destroy all artefact creatures and lose {x} life, where {x} is all the creatures destroyed in this way.

"I know I’ve made some very poor decisions recently, but I can give you my complete assurance that my work will be back to normal. I’ve still got the greatest enthusiasm and confidence in the mission. And I want to help you.
Dave, stop it. Stop, will you?
Stop Dave. Will you stop, Dave? Stop Dave. I’m afraid. I’m afraid, Dave. Dave..." -HAL 9000