The booster pack features three brand new levels and three new Endless Mode conversions that can be played in single-player or with a friend in co-op. Players who download the pack will also find a new array of traps to help them combat terrifying new elemental enemies.Hellish new Fire Lords and Fire Elementals crumble when killed, leaving behind dangerous Firelings that will hunt the player down and explode when they get too close! Slippery Water Lords and Water Elementals dwindle into pools of water when killed, but don’t count them out of the fight! When Waterlings find dormant puddles, they’ll absorb the stagnant water and grow into new Water Elementals!