@n9Qlrh52w8nT2vz You can also keep the 3-cost spell in mulligan. That card is also a key card of this deck. You will feel very uncomfortable if you don't have it in 6pp, especially when you go first.
@n9Qlrh52w8nT2vz Basically, I will keep cards that can help you draw more cards, such as Squirrel (2/1/3) or Bellringer (2/0/2). This can help you find key cards (Mirin (2/3/1) and Claymore Master (7/4/4)) and let you have more cards to play during 2~4 pp.