The cure

The Wood Army developed an experimental cure to the infection that lives in their planet, the petrified flasks, made of small stone pieces, ash, Sacer gas (from batonians) and sand.

They work as an anti infection that spreads only to infected places, when they take all they stop spreading and be petrified, forming the petrified biome.

Break a flask into the infected biome and it should work, if you throw in a normal biome nothing will happen and the ash will fly. It can spread 4 times as fast as the infection.