feat: add obscurus virtual aspect

src/main/java/dev/tilera/auracore/api/Aspects.java

@@ -23,6 +23,7 @@ public class Aspects {
     public static final Aspect FUNGUS = new Aspect("fungus", 16246215, new Aspect[] {Aspect.PLANT, Aspect.TREE}, new ResourceLocation("auracore", "textures/aspects/fungus.png"), 1);
 
     public static final Aspect VIS = new VirtualAspect("vis", 9896128, new ResourceLocation("thaumcraft", "textures/aspects/praecantatio.png"), 1);
+    public static final Aspect OBSCURE = new VirtualAspect("obscurus", 0x282828, new ResourceLocation("auracore", "textures/aspects/obscurus.png"), 1);
 
     public static void load() {
         if (Config.replaceAspects) {

src/main/resources/assets/auracore/lang/en_US.lang

@@ -22,4 +22,5 @@ tc.aspect.imperito=Control, Command, Dominate
 tc.aspect.solum=Soil, Ground, Foundation
 tc.aspect.flos=Flower, Bloom, Blossom
 tc.aspect.fungus=Mushroom, Toadstool, Fungi
-tc.aspect.vis=Vis
+tc.aspect.vis=Vis
+tc.aspect.obscurus=Unknown