The last sacrifice outlet is a little bit on the cheese side
Enchantments that either have abilities that trigger when they are destroyed, like Hatching Plans, or those that have worn out their usefulness, like Treacherous Blessing, are great inclusions for Ertai
With so much power packed into a single card type, you need plenty of ways to interact with thempreferably by smashing them into pieces
Be sure you have at least a reason or two to spring for a fetch land, otherwise, it's worth it to save some money and leave the big spending for decks that need more from their land base
When it enters, you have the option to bounce any permanent
Getting a huge ramp boost out of Lumra is trivial, and you even get an enormous threat out of the deal