The Holy Auspex

When The Holy Auspex enters the battlefield, you may exile target creature an opponent controls. If you do, exile target creature you control.
The Holy Auspex gets +1/+1 for each creature card you own in exile.
As long as the Holy Auspex's power is 4 or more, it has lifelink and deathtouch. As long as its power is 10 or more, it has indestructible.