diff --git a/Sources/Model/AbstractDieFace.cs b/Sources/Model/AbstractDieFace.cs
index 409c61e..b9baca9 100644
--- a/Sources/Model/AbstractDieFace.cs
+++ b/Sources/Model/AbstractDieFace.cs
@@ -8,6 +8,14 @@ namespace Model
 {
     public abstract class AbstractDieFace
     {
-        public string ID { get; set; }
+        /// <summary>
+        /// every die face has a value, and they can all be represented by an int,
+        /// even if they're not litterally a decimal number
+        /// <br/>
+        /// USE GetPracticalValue for a Value specific to face type
+        /// </summary>
+        protected abstract int Value { get; }
+
+        public abstract object GetPracticalValue();
     }
 }