this idiot forgot to commit an entire month's worth of code

Assets/Scripts/Effects/Effect.cs

@@ -11,7 +11,8 @@ public class Effect : ScriptableObject
     {
         EffectInstance newEffectInstance = Instantiate(effectInstanceObject, affectedEntity.transform);
         newEffectInstance.affectedEntity = affectedEntity;
-        
+        newEffectInstance.thisEffect = this;
+
     }
 
     public virtual void EffectTick(Entity affectedEntity)

Assets/Scripts/Effects/SpeedEffect.cs

@@ -0,0 +1,16 @@
+using UnityEngine;
+
+[CreateAssetMenu(fileName = "New Speed Effect", menuName = "Effects/Speed")]
+public class SpeedEffect : Effect
+{
+    [SerializeField] private float speedAmount;
+    public override void ApplyEffect(Entity affectedEntity)
+    {
+        base.ApplyEffect(affectedEntity);
+        affectedEntity.speedMultiplier += speedAmount;
+    }
+    public override void RemoveEffect(Entity affectedEntity)
+    {
+        affectedEntity.speedMultiplier = 1f; //supposed to be -= speedAmount but it's fucked.
+    }
+}

Assets/Scripts/Effects/SpeedEffect.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: c42a268529acb9c14b00a019f63603b8