Defeat enemies, burn and extinguish the roots and use Amphibian again on the groundplate and the exposed insides. Continue, beat the enemies, burn the roots and continue across the water. Glide across the gap, use Amphibian on the ground plate and shoot the exposed insides. Get across the gap with Water hazard, use Chiller's float ability to get the first sumo slammer (1/3). When the bridge drops down, you will find the last sumo slammer (3/3) behind some debris and will unlock the following achievement: Use water to open the door and as soon as you enter a timer will start to tick (using the hazard suit is recommended). Climb up and dispose of the enemies here. Climb up the ledge with Water hazard and use fire/radioactive to drop the box. After the cut scene, head to the very back for the next sumo slammer (2/3). Only concentrate your attacks on the big guy until he is down and then charge the small guy. These guys can be taken out quite easily. Now you come to a room where a boss battle awaits you. Defeat the incoming enemies and use the following elements in this order to proceed: radioactive/fire/water, radioactive and radioactive/water. Shoot the lamp and use fire on the truck to make a path you can climb up with water hazard. Use his water blast to open the door, Mudfire to blow the wall up and Energy to get through the dangerous environments. Use Water hazard to climb the ledges to the left and jump upstairs with a double jump. As soon as you start the level, turn around to find the first Sumo Slammer behind you (1/3).