War Between Worlds

As War Between Worlds enters the battlefield, choose Angels or Demons.
{w/b}{w/b}{w/b}: Put a battle counter on War Between Worlds. Creatures of the chosen type get +2/+2 for each battle counter on War Between Worlds.
{w/b}{w/b}{w/b}{w/b}{w/b}, Sacrifice War Between Worlds: Destroy all creatures except for the chosen type.