ExampleStatModifier

using Game.Entity;
using Game.Scripts.Core.Entity.Stats;

namespace Game.Scripts.Battle.Units
{
    public class StatModifier
    {
        public string Guid;
        public float Value;
        public int Order;
    }

    public class UnitBuffExample
    {
        private readonly EntityStatsStorage _statsStorage;

        private SceneUnit _sceneUnit;
        private StatModifier _modifier;

        public UnitBuffExample(EntityStatsStorage statsStorage)
        {
            _statsStorage = statsStorage;
        }

        public void Init(IEntity parentEntity)
        {
            _sceneUnit = parentEntity as SceneUnit;
            if (_sceneUnit == null)
                return;

            var entityStats = _statsStorage.Get(_sceneUnit.Guid);
            var hpStat = entityStats.Get<float>("HP");

            _modifier = new StatModifier
            {
                Guid = System.Guid.NewGuid().ToString(),
                Value = 10f,
                Order = 0
            };

            hpStat.ApplyModifier(_modifier);
        }

        public void Dispose()
        {
            var entityStats = _statsStorage.Get(_sceneUnit.Guid);
            var hpStat = entityStats.Get<float>("HP");
            hpStat.RemoveModifier(_modifier);
        }
    }
}