Wand Focus: Purity

*Not to be confused with the purity wand focus added by Thaumcraft 4 add-on Thaumic Horizons, which is not present in this modpack.*

The **purity wand focus** is an item that can be affixed to a Thaumcraft 4 wand or staff to reverse effects of taint and other magical biomes added by Thaumcraft. It is added by BlightBuster, a core mod made exclusively for Blightfall.

## Obtaining

A purity wand focus can be obtained via crafting in an arcane worktable after unlocking the Thaumonomicon research *Purity Focus*.

## Usage

### Cleaning Tainted Land

Upon right-clicking on a block with a wand or staff with this focus equipped, a 3x3 square area centered on the block clicked will have its biome changed from tainted land, eerie, or magical forest back to its original underlying biome.

This action costs 0.1 terra and 0.15 ordo vis for each column successfully converted.

### Cleaning Tainted Blocks

Upon right-clicking on a block with a wand or staff with this focus equipped, a 3x3 column spanning the entire vertical world height centered on the block clicked will have all tainted blocks removed. Fibrous taint, tainted plants, and spore stalks are quietly deleted, tainted soil is replaced with dirt, and crusted taint becomes a block of flux goo.

This specific function incurs no vis cost; however, since tainted blocks exist almost exclusively in the tainted land biome, a vis cost will usually be incurred for cleaning the tainted land biome at the same time.

### Curing Tainted Mobs

Upon right-clicking with a wand or staff with this focus equipped while facing a nearby tainted mob, that mob will become its vanilla un-tainted counterpart.

This applies to the following mobs, all of which are added by Thaumcraft 4:

 Tainted cow
 Tainted chicken
 Tainted villager
 Tainted pig
 Tainted creeper

This action costs 0.1 terra and 0.15 ordo vis for each mob successfully cured.

It should be noted that none of the custom tainted NPCs created for this modpack are affected by this focus. This includes the tainted townsfolk that can be found in the Floating City, which are entirely separate mobs from tainted villagers despite their identical appearance.

### Purifying Tainted Nodes

Mining a tainted aura node while holding a wand or staff with this focus equipped will set it to normal.

This action costs 100 terra and 150 ordo vis.

It is notable that this specific action triggers at the moment the node block would be broken if it were being mined with any other tool. Aura nodes that aren't encased in silverwood logs or obsidian totems do not have a breaking progress animation, so a few seconds of persistence is necessary. It is impossible to break any block that contains an aura node by mining it with a wand or staff with this focus equipped, as the block breaking handler is completely overridden when an aura node is present, regardless of what kind of node it is or whether it is tainted.

## Upgrades

The purity focus can be upgraded using a focal manipulator. The following upgrades are available:

 2
 3
 4
 5
Frugal

Each enlarge upgrade will increase the square radius of the tainted land and tainted block purifying function by 1. This can be stacked up a total of 5 enlarge upgrades, yielding a maximum area of effect of 13x13 per cast.

Each frugal upgrade will reduce the vis cost of all focus actions by 10% (additive). This can be stacked up to a total of 5 frugal upgrades, yielding a total vis discount of 50%.

## Issues

Due to an oversight, blocks of flesh placed in the world will be removed by this focus, despite not being a tainted block. This is because the block of flesh shares its internal block ID with crusted taint and tainted soil.

If several seconds of mining does not purify a tainted node even with adequate vis, it could be due to passive wand charging (e.g. from a nearby vis relay or an equipped amulet of vis storage) interrupting the mining process. Charging of a wand or staff updates the item's metadata, which can cause Minecraft to think that the current held item has been swapped for another, which resets the block mining timer. This can be worked around by temporarily pausing the source of recharging.

None of the cleaning effects of this focus will trigger unless there is enough vis in the wand or staff to clean its full area of effect, even if the actual affected area is smaller than this and sufficient vis is available for such a cast. This also applies to mob purification, even though the enlarge upgrade otherwise has no effect on that action.

Utilizing this focus in the Silverwood Grove or at Eerie Island is not encouraged, as those portions of the map are naturally generated as magical forest and eerie biomes, respectively. While tainted land is still cleaned up effectively and replaced with the original biomes, this focus will also endlessly attempt to clean the magical forest and eerie biomes it leaves behind. This causes vis to be needlessly drained every time a right-click is registered, which can rapidly drain a wand or staff's vis if right-click is held down for as little as a few seconds.