Thin ice, bring your skateboard art but be careful with the monsters. Walk around and collect all the items, then take the monster into the water. Your health will decrease as you touch monsters and you will lose a lot of blood when falling into the water. There are many different monsters, but the technique is the same, putting all of them in water.
Your ice-skates leave a trail. On the ice and can make loops to cut holes in the ice. Drop all of the monsters into the water to clear a level.