For some reason, Shockwave doesn't respect tiered farmland, because e.g. Tertium Farmland (made with 1 Tertium Essence, made with 4 Prudentium Essence, each Prudentium Essence made with 4 Inferium Essence, and each Inferium Essence is dropped from mobs with a low chance.) In total, 16 Inferium essence would be lost per block turned into dirt. Considering it turns into dirt in a large area, it is a pain because i have to grind again for Inferium essence.