When the Defiled Lands spread to certain blocks, this will create the following defiled blocks :

• Stone/Cobblestone/Andesite/Diorite/Granite -> Defiled Stone
• Stone Bricks -> Defiled Stone Bricks
• Cracked Stone Bricks -> Cracked Defiled Stone Bricks
• Dirt -> Defiled Dirt
• Grass -> Defiled Grass
• Sand -> Defiled Sand
• Sandstone -> Defiled Sandstone
• Gravel -> Defiled Gravel
• Coal Ore/Block -> Hephaestite Ore/Block
• Iron Ore/Block -> Umbrium Ore/Block
• Diamond Ore/Block -> Scarlite Ore/Block

Tenebra Logs can be obtained from Tenebra Trees and can then be refined into planks and into doors. While they defile nearby blocks, they can't be obtained by defiling

The Healing Pad can be crafted using Scarlite, Umbrium and Defiled Stone. Standing on top of it will give Regeneration II for a few seconds.