I would Cut all 4
evolving wilds, and two
island and two
swamp for 4
watery grave to bring your card count to 60. also consider getting rid of the 4
flensermite... a 1/1 for two mana with no evasion isn't that important. maybe also cut either all 4
groundswell or might of krosa for either blue counters like
dispel or vaporsnag to protect yourself and win more quickly, or cheap black removal to push through your creatures if your opponent starts getting bigger creatures on the board.