About five years ago, those types of cards were much better since cubes were slower, but with many cubes adopting aggressive strategies and getting more efficient removal options, things like the Vindicate test (where you get an effect out of it if the creature dies at sorcery speed, so Consecrated Sphinx passes that test) hamper its effectiveness, but it does protect itself well if you are able to untap with it since you can turn just about any blue card into a counterspell or draw card
When you cast it from exile, it resolves normally
Table of Contents show What Are Walls in MTG
As shown in the card, you need to pay 2 additional generic mana to activate Outlast for this creature
The effect that allows you to play an additional land that turn is cumulative with other effects that do so, including itself
Summon: Primal Garuda: Its a solid removal spell on legs (wings?)