A.rcane A.rmageddon

When A.rcane A.rmageddon enters the battlefield set a timer (an actual timer!)
Every 10 minutes, whoever's turn it is, stop the timer, then they lose five life, sacrifice five permanents, and discard the top five cards of their library.
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"this weapon can wipe out the biggest of planes just by being hit with a rock! trust me! I tried..."