Ruby Storm wants to chain many cheap spells together in one turn, and Damping Sphere causes each spell to cost {1} more for each other spell cast that turn, which quickly prices them out of a long Past in Flames turn. The extra Lightning Bolt gives another way to kill Ral, Monsoon Mage. Cut Burning Inquiry since digging a storm deck deeper and filling their graveyard is actively dangerous, and trim Practiced Offense since this matchup is a race against their combo turn, not a board-stall.