Grave Flower added.

1. When carried in the inventory, it applies the Nausea effect and periodically deals 1 point of damage.
2. Upon contact in the world, it applies the Nausea effect for 6 seconds and deals damage equal to 2% of maximum health (but no less than 2 points).
3. If an undead mob contact with it, it is healed by 2% of its maximum health (but no less than 2 points).
4. Can only be placed on the Cursed Grass and on the Cursed Dirt.

Rotgrass added.

1. When carried in the inventory, it applies the Poison effect.
2. Upon contact in the world, it applies the Corrosion effect for 5 seconds.
3. If an undead mob contact with it, it applies the Corrosion effect for 2 seconds.
4. Can only be placed on the Cursed Grass and on the Cursed Dirt.

Other Changes:

1. Reduced the particle count for the Rotting Walker.
2. Now at a light level of 14 or higher, or in direct sunlight with light level of 14 or higher during clear weather Shadow takes 2 damage per second.
3. Now in direct sunlight with light level of 14 or higher during clear weather Ghost takes 2 damage per second.
4. The stability of the Ghost's invisibility improved.
5. Now Rotting Walker burns in sunlight.
6. Elixir Of Complete Knowledge now has a glowing effect (like an enchanted apple).