You must have BIG OLD SIDEWAYS ARROW and POINTY SIGN to make ARROW PLACARD. ARROW PLACARD belongs to category. Growing ARROW PLACARD takes 0d 01h 30m 23s. You get experiance points for breaking ARROW PLACARD. Hitting it will break it but you need to count the hits yourself. Seed mathematics is very complicated, but you should get at least 1 seed back from splicing ARROW PLACARD. Will you strike it rich? You just have to count the gems yourself. Will you get enough blocks to build something? You just have to find out yourself.