Add Launching modifier - sends enemies flying upward

src/main/java/dev/marston/randomloot/loot/modifiers/ModifierRegistry.java

@@ -67,6 +67,7 @@ public static Modifier getModifier(String name) {
 	public static Modifier PUMMELING = register(new Pummeling());
 	public static Modifier HAILEYS_WRATH = register(new HaileysWrath());
 	public static Modifier EARLY_BIRD = register(new EarlyBird());
+	public static Modifier LAUNCHING = register(new Launching());
 
 	// Biome-restricted modifiers
 	public static Modifier AQUATIC = register(new Aquatic());
@@ -103,7 +104,7 @@ public static Modifier getModifier(String name) {
 	public static final Set<Modifier> BREAKERS = Set.of(EXPLODE, LEARNING, ATTRACTING, VEINY, MELTING, EXCAVATOR, PROSPECTOR, MUNCHIES, FRAGILE, LUMBERING);
 	public static final Set<Modifier> USERS = Set.of(TORCH_PLACE, DIRT_PLACE, FIRE_PLACE, FIRE_BALL, VOID_TOUCHED);
 	public static final Set<Modifier> HURTERS = Set.of(CRITICAL, CHARGING, FLAMING, COMBO, DRAINING, POISONOUS,
-			WITHERING, BLINDING, BEZERK, NEMESIS, SOULBOUND, SCORCHED, FROZEN, OVERGROWN, FIERCE, FEASTING, EXECUTIONER, CROWD_PLEASER, PUMMELING, HAILEYS_WRATH, MUNCHIES, CHAOTIC, FRAGILE, CLUNKY, EARLY_BIRD);
+			WITHERING, BLINDING, BEZERK, NEMESIS, SOULBOUND, SCORCHED, FROZEN, OVERGROWN, FIERCE, FEASTING, EXECUTIONER, CROWD_PLEASER, PUMMELING, HAILEYS_WRATH, MUNCHIES, CHAOTIC, FRAGILE, CLUNKY, EARLY_BIRD, LAUNCHING);
 	public static final Set<Modifier> HOLDERS = Set.of(HASTY, ABSORBTION, FILLING, RAINY, ORE_FINDER, SPAWNER_FINDER,
 			LIVING, REGENERATING, RESISTANT, FIRE_RESISTANT, AQUATIC, HUNTER, FEASTING, NATURALIST, CLUNKY);
 

src/main/java/dev/marston/randomloot/loot/modifiers/hurter/Launching.java

@@ -0,0 +1,114 @@
+package dev.marston.randomloot.loot.modifiers.hurter;
+
+import dev.marston.randomloot.loot.LootItem.ToolType;
+import dev.marston.randomloot.loot.LootUtils;
+import dev.marston.randomloot.loot.modifiers.EntityHurtModifier;
+import dev.marston.randomloot.loot.modifiers.Modifier;
+import net.minecraft.ChatFormatting;
+import net.minecraft.core.particles.ParticleTypes;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.network.chat.Component;
+import net.minecraft.network.chat.MutableComponent;
+import net.minecraft.world.entity.LivingEntity;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.phys.Vec3;
+
+import java.util.List;
+
+public class Launching implements EntityHurtModifier {
+
+	private String name;
+	private final static String LEVEL = "trait_level";
+	private int level = 0;
+
+	public Launching(String name, int level) {
+		this.name = name;
+		this.level = level;
+	}
+
+	public Launching() {
+		this.name = "Launching";
+		this.level = 0;
+	}
+
+	public Modifier clone() {
+		return new Launching();
+	}
+
+	@Override
+	public CompoundTag toNBT() {
+		CompoundTag tag = new CompoundTag();
+		tag.putString(NAME, name);
+		tag.putInt(LEVEL, level);
+		return tag;
+	}
+
+	@Override
+	public Modifier fromNBT(CompoundTag tag) {
+		return new Launching(tag.getStringOr(NAME, "Launching"), tag.getIntOr(LEVEL, 0));
+	}
+
+	@Override
+	public String name() {
+		if (this.level == 0) {
+			return this.name;
+		}
+		return this.name + " " + LootUtils.roman(this.level + 1);
+	}
+
+	@Override
+	public String tagName() {
+		return "launching";
+	}
+
+	@Override
+	public String color() {
+		return ChatFormatting.WHITE.getName();
+	}
+
+	@Override
+	public String description() {
+		return "Send enemies flying upward when hit.";
+	}
+
+	@Override
+	public void writeToLore(List<Component> list, boolean shift) {
+		MutableComponent comp = Modifier.makeComp(this.name(), this.color());
+		list.add(comp);
+	}
+
+	@Override
+	public boolean forTool(ToolType type) {
+		return type.equals(ToolType.SWORD) || type.equals(ToolType.AXE);
+	}
+
+	@Override
+	public boolean hurtEnemy(ItemStack itemstack, LivingEntity hurtee, LivingEntity hurter) {
+		if (hurtee.level().isClientSide()) {
+			return false;
+		}
+
+		// Launch power scales with level: 0.6, 0.8, 1.0, 1.2
+		double launchPower = 0.6 + (level * 0.2);
+
+		// Get current velocity and add upward momentum
+		Vec3 currentVelocity = hurtee.getDeltaMovement();
+		hurtee.setDeltaMovement(currentVelocity.x * 0.5, launchPower, currentVelocity.z * 0.5);
+
+		// Mark velocity as changed so it syncs to client
+		hurtee.hurtMarked = true;
+
+		// Spawn cloud particles for visual feedback
+		Modifier.TrackEntityParticle(hurtee.level(), hurtee, ParticleTypes.CLOUD);
+
+		return false;
+	}
+
+	public boolean canLevel() {
+		return level < 3;
+	}
+
+	public void levelUp() {
+		this.level++;
+	}
+}

src/main/resources/data/randomloot/recipe/trait_launching.json

@@ -0,0 +1,8 @@
+{
+  "type": "randomloot:trait_change",
+  "item": {
+    "count": 1,
+    "id": "minecraft:slime_ball"
+  },
+  "trait": "launching"
+}