Remember the fire- and water-based magic spheres that were pathetically easy, that you faced earlier in the game? Well here comes the earth variant, now sporting even LESS HP than before! You'll blow these things away with a Winda spell, but they're also surprisingly susceptible to physical attacks. A combo from Mack may also be able to kill them with one attack, depending on his level and weapon. Don't give them time to hit you with any spells, and you'll be gold.