Phyrexian Flash- Comments

something im working on. the idea is to control the board and lay down the leyline, hopefully before the game begins. once the opponent makes an attack, flash in the obliterator and block and they sacrifice permanents which usually wins you the game. the mana base is pretty solid, havent had any problems. if i do find problems, i may lower the island count and put in more swamps. it does pretty good against the format but has problems against caw blades because all their creatures are flying. flashing in a non-flying obliterator is problematic vs a sworded squadron hawk. as for the sideboard: surgical extraction and memoricide are good for cawblades equipment, fauna shaman ( vengevine) bloodwitch for mono white. corrupted conscience to flash in to steal a big eldrazi fatty . torpor orb to stop twin. lifes finale incase you get swarmed.