Jihad

As Jihad enters the battlefield, choose a color
and an opponent. White creatures get +2/+1
as long as the chosen player controls
a nontoken permanent of the chosen color.
When the chosen player controls no
nontoken permanents of the chosen color,
sacrifice Jihad.
"When religion and politics travel in the same cart,
the riders believe nothing can stand in their way."
- Frank Herbert, Dune