Code

    @Override
    public InteractionResultHolder<ItemStack> use(Level world, Player player, InteractionHand hand) {
        long currentTime = System.currentTimeMillis();
        if (currentTime - lastUsedTime < 30000) { // 30-second delay
            return new InteractionResultHolder<>(InteractionResult.FAIL, player.getItemInHand(hand));
        }

        // Get all entities in the world
        List<Entity> entities = world.getEntities(player, new AABB(player.getX() - 10.0, player.getY() - 10.0, player.getZ() - 10.0, player.getX() + 10.0, player.getY() + 10.0, player.getZ() + 10.0));

        Entity nearestEntity = null;
        double nearestDistance = Double.MAX_VALUE;

        // Iterate through the entities to find the nearest one to the player
        for (Entity entity : entities) {
            double distance = player.distanceTo(entity);
            if (distance < nearestDistance) {
                nearestEntity = entity;
                nearestDistance = distance;
            }
        }

        if (nearestEntity != null) {
            // Get the position of the nearest entity
            Vec3 entityPos = nearestEntity.position();

            // Spawn green, purple, and blue smoke particles at the position of the nearest entity
            for (int i = 0; i < 50; i++) {
                world.addParticle(ParticleTypes.ENTITY_EFFECT,
                        entityPos.x(), entityPos.y(), entityPos.z(),
                        Math.random() - 0.5, Math.random() - 0.5, Math.random() - 0.5
                );
            }

            // Apply damage to the nearest entity
            if (nearestEntity instanceof LivingEntity) {
                nearestEntity.hurt(DamageSource.playerAttack(player).bypassArmor(), 15f);
            }

            // Update the last used time
            lastUsedTime = currentTime;
            return new InteractionResultHolder<>(InteractionResult.SUCCESS, player.getItemInHand(hand));
        }

        return super.use(world, player, hand);
    }