diff --git a/src/main/java/me/melontini/commander/impl/Commander.java b/src/main/java/me/melontini/commander/impl/Commander.java
index 96c2f88..8449140 100644
--- a/src/main/java/me/melontini/commander/impl/Commander.java
+++ b/src/main/java/me/melontini/commander/impl/Commander.java
@@ -10,8 +10,9 @@
 import me.melontini.commander.impl.builtin.BuiltInEvents;
 import me.melontini.commander.impl.builtin.BuiltInSelectors;
 import me.melontini.commander.impl.event.data.DynamicEventManager;
-import me.melontini.commander.impl.util.ArithmeticaLootNumberProvider;
 import me.melontini.commander.impl.util.eval.EvalUtils;
+import me.melontini.commander.impl.util.loot.ArithmeticaLootNumberProvider;
+import me.melontini.commander.impl.util.loot.ExpressionLootCondition;
 import me.melontini.commander.impl.util.mappings.MappingKeeper;
 import me.melontini.commander.impl.util.mappings.MinecraftDownloader;
 import me.melontini.dark_matter.api.base.util.Exceptions;
@@ -21,8 +22,11 @@
 import net.fabricmc.api.ModInitializer;
 import net.fabricmc.loader.api.FabricLoader;
 import net.fabricmc.mappingio.tree.MemoryMappingTree;
+import net.minecraft.loot.condition.LootConditionType;
 import net.minecraft.loot.provider.number.LootNumberProviderType;
 import net.minecraft.loot.provider.number.LootNumberProviderTypes;
+import net.minecraft.registry.Registries;
+import net.minecraft.registry.Registry;
 import net.minecraft.util.Identifier;
 import net.minecraft.util.Util;
 
@@ -40,6 +44,7 @@ public class Commander implements ModInitializer {
 
     public static final PrependingLogger LOGGER = PrependingLogger.get();
     public static final LootNumberProviderType ARITHMETICA_PROVIDER = LootNumberProviderTypes.register("commander:arithmetica", ExtraCodecs.toJsonSerializer(Arithmetica.CODEC.xmap(ArithmeticaLootNumberProvider::new, ArithmeticaLootNumberProvider::value)));
+    public static final LootConditionType EXPRESSION_CONDITION = Registry.register(Registries.LOOT_CONDITION_TYPE, id("expression"), new LootConditionType(ExtraCodecs.toJsonSerializer(ExpressionLootCondition.CODEC)));
 
     public static final Path COMMANDER_PATH = FabricLoader.getInstance().getGameDir().resolve(".commander");
     public static final String MINECRAFT_VERSION = getVersion();
diff --git a/src/main/java/me/melontini/commander/impl/util/eval/EvalUtils.java b/src/main/java/me/melontini/commander/impl/util/eval/EvalUtils.java
index 58fe399..f38ce39 100644
--- a/src/main/java/me/melontini/commander/impl/util/eval/EvalUtils.java
+++ b/src/main/java/me/melontini/commander/impl/util/eval/EvalUtils.java
@@ -130,14 +130,18 @@ public static EvaluationValue evaluate(LootContext context, Expression exp) {
     }
 
     public static DataResult<Arithmetica> parseEither(Either<Double, String> either) {
-        return either.map(d -> DataResult.success(Arithmetica.constant(d)), string -> parseExpression(string).map(func -> Arithmetica.of(context -> func.apply(context).getNumberValue().doubleValue(), string)));
+        return either.map(d -> DataResult.success(Arithmetica.constant(d)), string -> wrapExpression(parseExpression(string)).map(func -> Arithmetica.of(context -> func.apply(context).getNumberValue().doubleValue(), string)));
     }
 
-    public static DataResult<Function<LootContext, EvaluationValue>> parseExpression(String expression) {
+    public static DataResult<Function<LootContext, EvaluationValue>> wrapExpression(DataResult<Expression> result) {
+        return result.map(expression -> context -> evaluate(context, expression));
+    }
+
+    public static DataResult<Expression> parseExpression(String expression) {
         try {
             Expression exp = new Expression(expression.replace(":", "__idcl__"), CONFIGURATION);
             exp.validate();
-            return DataResult.success(context -> evaluate(context, exp));
+            return DataResult.success(exp);
         } catch (Throwable throwable) {
             return DataResult.error(throwable::getLocalizedMessage);
         }
diff --git a/src/main/java/me/melontini/commander/impl/util/ArithmeticaLootNumberProvider.java b/src/main/java/me/melontini/commander/impl/util/loot/ArithmeticaLootNumberProvider.java
similarity index 93%
rename from src/main/java/me/melontini/commander/impl/util/ArithmeticaLootNumberProvider.java
rename to src/main/java/me/melontini/commander/impl/util/loot/ArithmeticaLootNumberProvider.java
index f4c5a04..585a1fc 100644
--- a/src/main/java/me/melontini/commander/impl/util/ArithmeticaLootNumberProvider.java
+++ b/src/main/java/me/melontini/commander/impl/util/loot/ArithmeticaLootNumberProvider.java
@@ -1,4 +1,4 @@
-package me.melontini.commander.impl.util;
+package me.melontini.commander.impl.util.loot;
 
 import me.melontini.commander.api.expression.Arithmetica;
 import me.melontini.commander.impl.Commander;
diff --git a/src/main/java/me/melontini/commander/impl/util/loot/ExpressionLootCondition.java b/src/main/java/me/melontini/commander/impl/util/loot/ExpressionLootCondition.java
new file mode 100644
index 0000000..3c0eb7d
--- /dev/null
+++ b/src/main/java/me/melontini/commander/impl/util/loot/ExpressionLootCondition.java
@@ -0,0 +1,25 @@
+package me.melontini.commander.impl.util.loot;
+
+import com.ezylang.evalex.Expression;
+import com.mojang.serialization.Codec;
+import me.melontini.commander.impl.Commander;
+import me.melontini.commander.impl.util.eval.EvalUtils;
+import net.minecraft.loot.condition.LootCondition;
+import net.minecraft.loot.condition.LootConditionType;
+import net.minecraft.loot.context.LootContext;
+
+public record ExpressionLootCondition(Expression expression) implements LootCondition {
+    public static final Codec<ExpressionLootCondition> CODEC = Codec.STRING
+            .comapFlatMap(EvalUtils::parseExpression, exp -> exp.getExpressionString().replace("__idcl__", ":"))
+            .xmap(ExpressionLootCondition::new, ExpressionLootCondition::expression);
+
+    @Override
+    public LootConditionType getType() {
+        return Commander.EXPRESSION_CONDITION;
+    }
+
+    @Override
+    public boolean test(LootContext context) {
+        return EvalUtils.evaluate(context, expression).getBooleanValue();
+    }
+}
diff --git a/src/main/java/me/melontini/commander/impl/util/macro/PatternParser.java b/src/main/java/me/melontini/commander/impl/util/macro/PatternParser.java
index 9586a3d..d07f38e 100644
--- a/src/main/java/me/melontini/commander/impl/util/macro/PatternParser.java
+++ b/src/main/java/me/melontini/commander/impl/util/macro/PatternParser.java
@@ -47,7 +47,7 @@ private static String sb(Consumer<StringBuilder> consumer) {
     }
 
     public static DataResult<Function<LootContext, String>> parseExpression(String expression, String cast) {
-        var result = EvalUtils.parseExpression(expression);
+        var result = EvalUtils.wrapExpression(EvalUtils.parseExpression(expression));
         if (cast != null) {
             return switch (cast) {
                 case "long" -> result.map(function -> context -> String.valueOf(function.apply(context).getNumberValue().longValue()));