Unseat (Rider ability)
unseat [mounted person]
Riders can attempt to attack their mounted opponents with the goal
of knocking them off of their mounts. The attacker must be wielding a
large enough weapon to have his attack be of any consequence.
Unseat is primarily a rider skill and its success is based on the
mounted combat skill. A successful attempt costs 20 EP, while a failed
one costs 10 EP.