The ways I was thinking of making unique was either changing the type of arrow, or giving your card an ability. Abilities are a WIP right now but they will definitely make your card more unique and potentially useful. There's three abilities that I am working on, 2 flip abilities where you flip across the X or Y axis when pushed, and a slam ability that pushes in every direction you have an arrow for. Each card gets only one ability, or they can have no ability.