Interaction and Sweepers Abzan colors allow you to play a lot of spot removal, which should be a primary line of defense
Otherwise, if you would be looking for a Starter Deck to play immediately, the Sapphire Steel option might be a little better
Archivist of Oghma The problem with Stax cards that prevent certain actions, like Aven Mindcensor, is that while you might get the drop on one player, from then on your opponents can play around your card until it's removed
This change isnt huge, but it could easily be the difference between a manabase that plays out smoothly andconsistently and one that doesnt, and remember that, on top of making our colored mana work better, were also just drawing fetchlands more often, meaning we get to take more advantage of all the fringe benefits of fetchlands
And thats not to mention the Vindicate effect and card advantage bundled in
It often costs far less than 9 mana and clears the board of non-elementals while it leaves your side intact