Lore-wise, it is said, that "Wraithbone is essentially solidified warp energy that is manipulated by a Bonesinger into any shape that is required." https://warhammer40k.fandom.com/wiki/Wraithbone.
This can be imitated in rimworld by allowing them a recipe to create wraithbone, at art stations, and using artistic skill. Maybe wood and steel as well (as represents of lesser forms of wraithbone, for exodite).
Such recipes require balancing and obvious offsets for these recipes are
1) relatively large work requirement
2) required level of artist skill
For example, might require artist 6 and 1200 for 4 wood, artist 8 and 1200 work for 2 steel, artist 10 and 1200 work for 1 wraithbone.

possible code:
<RecipeDef>
<defName>CallWarpWood</defName>
<label>Call warp wood</label>
<description>Calls logs from warp</description>
<jobString>Temper Fishbone</jobString>
<workSpeedStat>SculptingSpeed</workSpeedStat>
<effectWorking>Sculpt</effectWorking>
<soundWorking>Recipe_Sculpt</soundWorking>
<ingredients>
</ingredients>
<products>
<WoodLog>4</WoodLog>
</products>
<workSkill>Artistic</workSkill>
<recipeUsers>
<li>TableSculpting</li>
<li>ArtSpot</li>
</recipeUsers>
<skillRequirements>
<Artistic>6</Artistic>
</skillRequirements>
<workAmount>1200</workAmount>
</RecipeDef>

<RecipeDef>
<defName>CallWarpSteel</defName>
<label>Call warp steel</label>
<description>Calls logs from warp</description>
<jobString>Temper Fishbone</jobString>
<workSpeedStat>SculptingSpeed</workSpeedStat>
<effectWorking>Sculpt</effectWorking>
<soundWorking>Recipe_Sculpt</soundWorking>
<ingredients>
</ingredients>
<products>
<Steel>2</Steel>
</products>
<workSkill>Artistic</workSkill>
<recipeUsers>
<li>TableSculpting</li>
<li>ArtSpot</li>
</recipeUsers>
<skillRequirements>
<Artistic>8</Artistic>
</skillRequirements>
<workAmount>1200</workAmount>
</RecipeDef>

<RecipeDef>
<defName>CallWarpBone</defName>
<label>Call warpbone</label>
<description>Calls logs from warp</description>
<jobString>Temper Fishbone</jobString>
<workSpeedStat>SculptingSpeed</workSpeedStat>
<effectWorking>Sculpt</effectWorking>
<soundWorking>Recipe_Sculpt</soundWorking>
<ingredients>
</ingredients>
<products>
<OGE_Wraithbone>1</OGE_Wraithbone>
</products>
<workSkill>Artistic</workSkill>
<recipeUsers>
<li>TableSculpting</li>
<li>ArtSpot</li>
</recipeUsers>
<skillRequirements>
<Artistic>10</Artistic>
</skillRequirements>
<workAmount>1200</workAmount>
</RecipeDef>