Boomerang or Spellbook

{"ops":[{"insert":"I recently got to finally playtest this (https://archidekt.com/decks/8949754/soulless_aggressors) deck. My biggest problem it seemed was getting the "},{"insert":{"card-link":"Brotherhood Vertibird"}},{"insert":" able to attack. Once I boardwipe, I usually still have too many artifacts on the field to be able to hit with this thing. Which is great and sort of what I was going for. But even drawing 2 cards per turn, it's power is above 9 meaning it can't attack due to "},{"insert":{"card-link":"Ensnaring Bridge"}},{"insert":".\n\nSo the 2 options I came up with are either "},{"insert":{"card-link":"Boomerang"}},{"insert":" or "},{"insert":{"card-link":"Spellbook"}},{"insert":". I can bounce the bridge back to my hand and hit with the Vertibird which is only good for one round, but should be enough damage with the "},{"insert":{"card-link":"Chimeric Staff"}},{"insert":" also swinging. Or I can maximize my hand size to make sure that the Vertibird can attack multiple times if need be. \n\nLooking to get some opinions here, or even other card suggestions. I've got 2 spots open, but can finagle more for the right card. \n"}]}