Your training for mounted combat grants you the following benefits.
Martial Training
You gain proficiency with Martial weapons and training with Light armor, Medium armor, and Shields.
Charnel Strike
When you take the Attack action, you can use your Charnel Touch as a Bonus Action.
Intelligent Armor
While you are wearing armor, you can add your Intelligence modifier, instead of your Dexterity modifier, to your Armor Class.
Skeletal Mount
Additionally, when you perform your ValdaSpire24 ritual, you can animate the skeleton of a horse or similar animal as a Warhorse Skeleton. In combat, it functions as a controlled mount while you ride it (as defined in the rules on mounted combat).