Player/World Event
      │
      ▼
 [Interaction Detected]
  (e.g., Projectile hits Field)
      │
      │  Gather Tags:
      │   - Actor A: Ability.Projectile, Element.Fire
      │   - Actor B: Ability.Field,      Element.Water
      ▼
[Build Lookup Key]
   Key = (Ability.Projectile+Element.Fire,
          Ability.Field+Element.Water,
          Context="ProjectileThroughField")
      │
      ▼
[Query Data Assets]
   - Interaction Matrix → "ModifyProjectile"
   - Modification Asset → { NewElement=Steam,
                            DamageΔ=+10%,
                            SpeedΔ=-15%,
                            VFX=S_SteamTrail,
                            SFX=Steam_Hiss,
                            ImpactFx=S_SteamImpact }
      │
      ▼
[Apply In Place]
   - Update Tags: remove Element.Fire, add Element.Steam, add State.Modified
   - Update Properties: damage, speed, impact behavior
   - Update Presentation: Niagara/Materials/Sound via GameplayCues
      │
      ▼
[Replicate Lightweight State]
   - Tags replicated; clients play cues consistently