Grixis Cascade comment

Any constructive comments, other than splash white for baneslayers? Or turn into Jund.....you know who you are. This deck cascades into boarderposts for mana growth, which you can fix cascade cards with ponder, for fatties like Cruel and Nicol Bolas. Seems to be more of a combo toolbox but I like it and it wins pretty consistently. Spellbound Dragon works to fix your hand while being MUCH better than sphinx draw three cards guy, because the cards you discard (borderposts if you have enough mana ect) will boost him to make him very large. With borderposts you should have 27ish mana and with all the draw mana should never be a problem in this deck. Thank you for reading this just want to know your opinions, also sideboard needs some work. This will be a FNM deck so needs to be awesome thank you