Abu, Shadowwhisker Familiar

Deathtouch

Whenever Abu enters the battlefield or attacks, scry 1.
If you control a Witch, Wizard, or Warlock, you may instead draw a card and lose 1 life.

{1}{b}: Abu phases out. (Treat it as though he doesn’t exist until your next turn.)

As long as it's nighttime or you’ve lost life this turn, Abu gets +1/+1 and menace.