Good versus Evil

{t} add {w}{w} or {b}{b}
When this card enters the battlefield choose one:
-All white creatures get +1/+1, and all black creatures get -1/-1
-All black creatures get +1/+1, and all white creatures get -1/-1
All black creatures you control gain intimidate and all white creatures you control gain vigilance
When this card would be put in the graveyard put it instead at the top of target players library