Overgrown Battlement & Axebane Guardian Ancient ramparts infused with primal energy, channeling mana like the roots of an ancient world tree, ensuring the tide of war never ceases
Likewise, it also works really well in counters decks (like my Hamza, Guardian of Arashin deck), as the cost to prevent your draw will increase as Esper Sentinel gets bigger and bigger, easily making it more costly to pay for than even Rhystic Study
If you are looking for specific ways to play or a more fancy set of cards just to collect, there are other, better options for you
[...] The metagame of Commander has largely been dictated by the collector marketplace, which itself is largely dictated by a card's demand in non-Commander settings"
Whatever cost you pay, shes easily one of the best amethyst cards in Rise of the Floodborn and deserves a place in your purple deck
Then in your end step exile a random card from all foes, cast it for free, and then they eat damage equal to its cost - amazing free stuff and game winning life loss too