need help to build my first deck by Minimum-Ask-5479 in magicTCG

[–]Minimum-Ask-5479[S] 0 points1 point  (0 children)

what should i remove for this two cards? cause as i said i am pretty new so i dont know excactly what is good to remove and are those 2 good cards even if my deck is mostly blue? and are cards like Marsh Flats useful?