diff --git a/bonemarketsolver/data/buyers.py b/bonemarketsolver/data/buyers.py
index a1060b9..b202485 100644
--- a/bonemarketsolver/data/buyers.py
+++ b/bonemarketsolver/data/buyers.py
@@ -153,6 +153,10 @@ class Buyer(Enum):
             "Sell the Diplomat a fossil insect",
             cost = Cost.ACTION.value
             )
+    THE_TRIFLING_DIPLOMAT_REPTILE = Action(
+            "Sell the Diplomat a fossil reptile",
+            cost = Cost.ACTION.value
+            )
     THE_TRIFLING_DIPLOMAT_SKULLS = Action(
             "Sell the Diplomat a skeleton with multiple heads",
             cost = Cost.ACTION.value
diff --git a/bonemarketsolver/data/costs.py b/bonemarketsolver/data/costs.py
index 19bd7bd..8649805 100644
--- a/bonemarketsolver/data/costs.py
+++ b/bonemarketsolver/data/costs.py
@@ -87,6 +87,10 @@ class Cost(Enum):
     # Various opportunity cards
     HELL_FAVOURS = ACTION
 
+    # Infiltrating...
+    # Khan's Heart, 10 at a time
+    INFILTRATING = ACTION/10
+
     # Volume of Collated Research
     # Hurlers statue, 10 at a time
     COLLATED_RESEARCH = (ACTION + 4*HELL_FAVOURS)/10
@@ -171,7 +175,8 @@ class Cost(Enum):
     SCINTILLACK = 250
 
     # Searing Enigma
-    SEARING_ENIGMA = 6250
+    # Khan's Heart
+    SEARING_ENIGMA = 2*ACTION + 130*INFILTRATING
 
     # Carved Ball of Stygian Ivory
     STYGIAN_IVORY = 250
diff --git a/bonemarketsolver/solve.py b/bonemarketsolver/solve.py
index 59305d5..c523b8e 100644
--- a/bonemarketsolver/solve.py
+++ b/bonemarketsolver/solve.py
@@ -1182,6 +1182,37 @@ def Solve(shadowy_level, bone_market_fluctuations = None, zoological_mania = Non
     del non_negative_amalgamy, non_negative_menace, non_negative_antiquity, compromising_documents, value_remainder, derived_exhaustion
 
 
+    # The Trifling Diplomat - Reptile
+    model.AddLinearExpressionInDomain(skeleton_in_progress, cp_model.Domain.FromFlatIntervals([160, 169])).OnlyEnforceIf(actions[Buyer.THE_TRIFLING_DIPLOMAT_REPTILE])
+
+    non_negative_amalgamy = model.NewIntVar(cp_model.INT32_MIN, cp_model.INT32_MAX, '{}: {}'.format(Buyer.THE_TRIFLING_DIPLOMAT_REPTILE.name, 'non-negative amalgamy'))
+    model.AddMaxEquality(non_negative_amalgamy, [amalgamy, 0])
+
+    non_negative_menace = model.NewIntVar(cp_model.INT32_MIN, cp_model.INT32_MAX, '{}: {}'.format(Buyer.THE_TRIFLING_DIPLOMAT_REPTILE.name, 'non-negative menace'))
+    model.AddMaxEquality(non_negative_menace, [menace, 0])
+
+    non_negative_antiquity = model.NewIntVar(cp_model.INT32_MIN, cp_model.INT32_MAX, '{}: {}'.format(Buyer.THE_TRIFLING_DIPLOMAT_REPTILE.name, 'non-negative antiquity'))
+    model.AddMaxEquality(non_negative_antiquity, [antiquity, 0])
+
+    compromising_documents = model.NewIntVar(0, cp_model.INT32_MAX, '{}: {}'.format(Buyer.THE_TRIFLING_DIPLOMAT_REPTILE.name, 'compromising documents'))
+    model.AddGeneralMultiplicationEquality(compromising_documents, non_negative_amalgamy, non_negative_menace, non_negative_antiquity)
+
+    value_remainder = model.NewIntVar(0, 49, '{}: {}'.format(Buyer.THE_TRIFLING_DIPLOMAT_REPTILE.name, 'value remainder'))
+    model.AddModuloEquality(value_remainder, value, 50)
+
+    model.Add(primary_revenue == value - value_remainder + 50).OnlyEnforceIf(actions[Buyer.THE_TRIFLING_DIPLOMAT_REPTILE])
+    model.Add(secondary_revenue == 50*compromising_documents).OnlyEnforceIf(actions[Buyer.THE_TRIFLING_DIPLOMAT_REPTILE])
+
+    model.Add(difficulty_level == 0).OnlyEnforceIf(actions[Buyer.THE_TRIFLING_DIPLOMAT_REPTILE])
+
+    # The indirection is necessary for applying an enforcement literal
+    derived_exhaustion = model.NewIntVar(cp_model.INT32_MIN, cp_model.INT32_MAX, '{}: {}'.format(Buyer.THE_TRIFLING_DIPLOMAT_REPTILE.name, 'derived exhaustion'))
+    model.AddDivisionEquality(derived_exhaustion, compromising_documents, 100)
+    model.Add(added_exhaustion == derived_exhaustion).OnlyEnforceIf(actions[Buyer.THE_TRIFLING_DIPLOMAT_REPTILE])
+
+    del non_negative_amalgamy, non_negative_menace, non_negative_antiquity, compromising_documents, value_remainder, derived_exhaustion
+
+
     # The Trifling Diplomat - Skulls
     model.Add(skeleton_in_progress >= 100).OnlyEnforceIf(actions[Buyer.THE_TRIFLING_DIPLOMAT_SKULLS])
     model.Add(skulls >= 5).OnlyEnforceIf(actions[Buyer.THE_TRIFLING_DIPLOMAT_SKULLS])