Thanks to their efforts, Zendikar can rebuild but, as Wizards has hinted, the Eldrazi have left an indelible impression on the plane
This depends on which Ajani card were talking about
She argues that cEDH (and all of Commander by extension) has windows in the game where youre able to avoid opponents counterplay
In fact, Tetzimoc, Primal Death is the only card in Magic history that can put prey counters on permanents, so chances are that if you arent running it in your main deck, having it in the command zone is pretty much worse than having any other commander instead
And its original Worldwake printing jumped much higher: Source: MTGStocks Stoneforge Mystic, Worldwake printing (I wouldn't fault you for thinking we've pasted the same image twice but notice how it shoots all the way past $40, going close to $50 on average in the US markets!)