Tormod's Crypt disrupts their Genesis recursion engine by exiling the graveyard before they can pay to return creatures to hand. Ray of Revelation is mostly a sideboard slot here in case they bring in enchantment-based hate, but functions as flexible interaction. Swords to Plowshares is premium removal against Ravenous Baloth and Krosan Tusker, exiling them before they can trade profitably or gain value. Earthquake is weak since it doesn't kill their bigger creatures and also hurts your own board and face, so it's cut for more targeted disruption.