Knewton, Decay's Intelligence

The Decay (Any damage dealt sends creatures
into exile.)
If Knewton, Decay's Intelligence was to be
removed from the battlefield, send target
attacking creature to exile and add +10/+10
to Knewton, Decay's Intelligence. Send Knewton,
Decay's Intelligence to exile at your end step.
Loyal to Apeiron, loyal to the cause, loyal to death.