Apart from being a disruptive flying tribe with two very strong lords in Drogskol Captain and Empyrean Eagle, Spirits get a fun aura sub-theme thanks to Tallowisp, which allows us to tutor for an aura whenever we cast a Spirit. This allows us to grab Staggering Insight to draw some cards and gain some life, Starlit Mantle to protect our creatures, and Pacifism as removal. While the deck doesn't have much real removal, keep in mind that once we have Nebelgast Herald on the battlefield, we can flash in Spirits (either naturally or with the help of Rattlechains giving all of our Spirits flash) to tap down potential attackers.