John Brown

When John Brown dies, he deals damage equal to
his power to each player who controls a creature
or planeswalker they do not own, then exile him.
As long as John Brown is in exile, creatures you
control gain +1/+0 as long as any opponent
controls a creature or planeswalker they do not
own.
{w}{r}, {t}: John Brown gets +4/+0 until end of
turn. Sacrifice John Brown.