Connect Emperor Nexus retention to original Ambassador purchases

docs/NEXUS_CARD_RULES.md

@@ -12,6 +12,17 @@ movement, battle geometry and actual casualties stay unchanged. One original
 Karama response cancels the entire physical batch and keeps the Nexus spent.
 [Source, original native proofs and controls](NEXUS_BENE_GESSERIT_RULES.md#recommended-cunning-card-exceptions--14-october-2026).
 
+## Recommended Emperor original Ambassador purchase — 14 October 2026
+
+Original Richese Ambassador trigger now offers uniform beneficiary Pay or
+eligible actual unallied Emperor Nexus Use. Recommended visibly provisional
+purchase composition retains three own spice with no bank payment, seller
+reimbursement or fake auction. Actual draw/stock, native bonus and original
+movement/worm continuation run once. Version-three receipts bind the consumed
+entry/token and actual buyer; Truthtrance restores the original decision.
+CHOAM closing sales/trades do not become a direct purchase producer.
+[Source policy and changed-path proof](NEXUS_EMPEROR_RULES.md#recommended-original-ambassador-purchase--14-october-2026).
+
 ## Recommended Emperor Richese seller retention — 14 October 2026
 
 Original Richese cache and Advanced Black Market now offer uniform buyer Pay
@@ -20,7 +31,7 @@ retains the personally affordable full price, leaves seller/bank unpaid and
 delivers one original card through native bonus/round continuation. Self-cache
 is legal where originally offered; self-Black remains prohibited. The unpaid
 seller is a visibly provisional conservative recommendation, not publisher
-clarification. Direct CHOAM/Ambassador acquisitions remain open.
+clarification. Other purchase sources retain their separate source contracts.
 [Source, policy and changed-path proof](NEXUS_EMPEROR_RULES.md#recommended-richese-seller-unpaid-purchase--14-october-2026).
 
 ## Recommended Emperor independent extra return — 14 October 2026