Extend Basic Nexus Kull to Ixian factions

docs/RULE_DECISIONS.md

@@ -1,5 +1,12 @@
 # Rule decision index
 
+## Basic Ixian Nexus Kull and Sandtrout — 30 October 2026
+
+The existing Basic Kull and Ixian Nexus responses compose through the native
+Bidding continuation. A waiting Sandtrout does not remove an earned Emperor
+Nexus ordinary bank benefit. No new publisher timing ruling is implied.
+[Scope](NEXUS_CARD_RULES.md#basic-ixian-nexus-kull-and-sandtrout--30-october-2026).
+
 ## Basic native Nexus reactions and Kull — 30 October 2026
 
 Fresh Basic E1/E2 Nexus starts retain native Harkonnen, Ixian and Guild