fix spectrum indestructible appearing in matrix enchanting

src/main/java/org/violetmoon/quark/addons/oddities/inventory/EnchantmentMatrix.java

@@ -146,9 +146,16 @@ private EnchantmentDataWrapper generateRandomEnchantment(Map<Enchantment, Intege
 
 		List<EnchantmentDataWrapper> validEnchants = new ArrayList<>();
 		BuiltInRegistries.ENCHANTMENT.forEach(enchantment -> {
+
 			String id = BuiltInRegistries.ENCHANTMENT.getKey(enchantment).toString();
 			boolean isValid = true;
-			if(enchantment.isTreasureOnly()) {
+
+			if (!enchantment.isDiscoverable()) {
+				isValid = MatrixEnchantingModule.allowUndiscoverableEnchantments ||
+					MatrixEnchantingModule.undiscoverableWhitelist.contains(id);
+			}
+
+			if(isValid && enchantment.isTreasureOnly()) {
 				isValid = MatrixEnchantingModule.allowTreasures ||
 						(isBook && MatrixEnchantingModule.treasureWhitelist.contains(id));
 			}

src/main/java/org/violetmoon/quark/addons/oddities/module/MatrixEnchantingModule.java

@@ -94,9 +94,15 @@ public class MatrixEnchantingModule extends ZetaModule {
 	@Config(description = "Set this to true to allow treasure enchantments to be rolled as pieces")
 	public static boolean allowTreasures = false;
 
+	@Config(description = "Set this to true to allow undiscoverable enchantments to be rolled as pieces")
+	public static boolean allowUndiscoverableEnchantments = false;
+
 	@Config(description = "Any treasure enchantment IDs here will be able to appear in books in matrix enchanting")
 	public static List<String> treasureWhitelist = Lists.newArrayList();
 
+	@Config(description = "Any undiscoverable enchantment IDs here will be able to appear in matrix enchanting")
+	public static List<String> undiscoverableWhitelist = Lists.newArrayList();
+
 	@Config(description = "Set to false to disable the tooltip for items with pending enchantments")
 	public static boolean showTooltip = true;