Braun Rockhead, Friend of All

{3}{w} The Power of Friendship: Gain control of
target opponent creature until the end of
your turn. If target creature's mana cost
is 7 or less, gain control of it permanently.
{w}{w}{w}{w}{w} Holy Fury: If you control exactly 21 creatures, Braun Rockhead, Friend of All
deals 7 damage to all opponent creatures, planeswalkers, and players.
"Hey guys! Did you see Nezznar's pickled head?!"