You can block, smooth out your draws, then cash it in for a nice three cards when the game goes long
However, considering the complete dominance of Chaos in the meta, including answers in the maindeck seems a very reasonable choice
First, she is a Noble Arms card, which means she can be selected as a target for Borz mill effect, which is even greater when coupled with the fact that you can equip her from hand OR graveyard
Skymarcher Aspirant and Vicious Conquistador dont always translate very well to the late-game and transforming Legions Landing is difficult against anything removal-heavy
Especially if you are willing to sacrifice NM condition and go for cards that are SP or lower
its relatively normal to see these three spells in the one deck, as they can help improve consistency while keeping your hand stocked