Look at dem legs . <| sep |> I ' m not a computer science student but I always hear the computer science students at university going on about how they ' ll be making millions of dollars per year eventually . I was just wondering if there ' s any information online that tells us how much the majority of computer science graduates earn in a year ? <| sep |> Yeah the my post was a bit too salty for no real reason . Sorry for that . <| sep |> First and foremost , Lightning Axe can only target Creatures . Planeswalkers are not Creatures other than Gideon . Second , you can only cast an Instant while you have priority . 304 . 1 . A player who has priority may cast an instant card from his or her hand . So , it ' s the Active Player ' s Main Phase , and they have just cast their Planeswalker spell , they will regain priority and pass it to you . 601 . 2 i Once the steps described in 601 . 2 ah are completed , the spell becomes cast . If the spell ' s controller had priority before casting it , he or she gets priority . 116 . 3 d If a player has priority and chooses not to take any actions , that player passes . Now , you have priority while the Planeswalker spell is on the Stack , you can cast your Instant now . So , you pass priority , and the Planeswalker spell resolves . And , the Active Player gets priority . 116 . 4 . If all players pass in succession that is , if all players pass without taking any actions in between passing , the spell or ability on top of the stack resolves 116 . 3 b The active player receives priority after a spell or ability other than a mana ability resolves . Now , the Active Player has priority and can active one of the loyalty abilities of their new Planeswalker . Assuming that they do , then they will pass priority to you , and you can cast your Instant now . Assuming they don ' t , then the Main Phase will end in paper , you ' d get another chance to cast your Instant , but , and it will move to the next Step , either the Beginning of Combat step or the End step , depending on which Main Phase it was , and you may cast your Instant now .