[0.981] XML issue/fix for Binding faction trait for custom factions
A custom faction with the Binding trait will be unable to train spiders unless the race is Resoln.
The reason is because the spiders have this XML
and mirrored in the racetype of course
<StartingUnitType>Unit_BoundHoarder</StartingUnitType>
<StartingUnitType>Unit_BoundWidow</StartingUnitType>
However, there is absolutely no reason to have this <IsStartingUnitType>1</IsStartingUnitType> on them because they are already limited by access to the faction trait Binding (and some for techs). There is only a need for <IsStartingUnitType>1</IsStartingUnitType> when a unit has no prereqs and thus would otherwise appear for all races.
To make the spiders from Binding trait available for all factions simply remove <IsStartingUnitType>1</IsStartingUnitType> from their UnitType (and clean up the racetype while you're at it).
Also be advised that the Bound Hoarder requires the Black Quire technology which is limited to Empires. A kingdom that selects Binding will never be able to build those units (just as they will also not be getting special summons from death shards).