Vile, the Night Owl

Partner with Dawn, the Early Bird (When this
creature enters the battlefield, target player may
put Dawn into their hand from their library,
then shuffle.)
When Vile, the Night Owl enters the battlefield,
it becomes night.
If it's night, Rouges you control get +2/+0 and
have Shadow. (This creature can block or be
blocked by only creatures with shadow.)