Soul Soil

Soul soil is a block naturally found only in the soul sand valley.

Natural generation
Soul soil generates naturally in the soul sand valley biome.

Breaking
Soul soil drops as an item when broken with any tool or by hand, but a shovel is the fastest way to break it.

Block loot
Soul soil drops as an item when broken with any tool or by hand. In addition, soul campfires drop 1 soul soil when broken without the Silk Touch enchantment.

Usage
Unlike soul sand, soul soil does not slow mobs down.

Fire
Fire lit on soul soil becomes soul fire.

Withers
4 blocks of soul soil (or soul sand) are used in the construction of a wither.

Basalt
Lava on top of soul soil and directly adjacent to blue ice turns into basalt.