Win the Crowd's Favor

Select a target creature you control. Whenever
that creature survives each combat, it gets
+1/+1 for each creature it destroys.
"The roar of the crowd can be intoxicating. It can give
you the edge you need to defeat an opponent. It can
also seal your fate should you lose favor. The arena
is not a battlefield. The thrill of the fight has waned.
But how will they fare in all-out war?"