Scrying before drawing makes a huge difference, but the worst case here is just having an overpriced draw spell
For example, playing both Apex Altisaur and Temple Altisaur can allow you to chomp your way through ten creatures
But this is a brand-new archetype - phasing and exiling matters
Yes, it does both and this is again good, it is a very rounded card but it doesn't quite feel like it is ever enough to merit it
Also, Whenever a creature is put into an opponents graveyard from the battlefield, you gain life equal to its toughness. The rulings around MTG have changed since this card was first printed, and the short of that is that it actually affects all opponents, which makes it incredibly good at gaining you life
Ardoz's text also says whenever it or another creature enters the battlefield under your control, that creature gets +2/+0 until the end of your turn