You can supplement this with rummage effects like Bitter Reunion, Cathartic Pyre, and Fear of Missing Out
Self-protection, plus very strong creature protection from noncombat damage protection make this wall great alongside pingers and any of the best activated abilities your deck runs
Six mana is asking a lot, even though Chandra, Flamecaller was certainly powerful
So, Ertai is a great Enchantment sacrifice commander, but a pretty good Bad Gifts commander, too
By the way, that stack weighed 878 grams, if you were interested
While eBay is also an option (and also owns TCGPlayer), Ive found TCGPlayer to be the most reliable way to buy single cards, with more knowledgeable (and careful) vendors when it comes to purchasing via a third-party