Specifically against Affinity, a deck which has recently been seeing more play and has even managed to top 8 the last Modern Challenge, destroying two artifacts very early can prevent them from even playing their Thought Monitor, Thoughtcast, Sojourners Companions and other cards since they will lack the necessary amount of Artifacts to enable Affinity
Whenever your opponent casts their first non-creature spell each turn, you may draw a card, unless your opponent pays X (where X is Esper Sentinel's power)
She's a five-mana 4/4, legendary enchantment creature with menace - Overall, respectable stats
Not only are they a fan-favorite Final Fantasy IX character, but their abilities are seriously strong too
Despite a brief pause from 2015 to 2018 WotC released one every year
There are also some notable reprints in the deck, including Commander's Plate, Shadowsper, Embercleave, and Chandra's Ignition