In the chapter, Leon is riding next to some lord who's luring a horned horse (they don't call it unicorn so I won't) into a trap by using a young.
The 'trap' is basically a canyon filled with explosives and archers on the cliffs hiding.
Then when the thing shows up, they killed the young, set off the trap and make a wall of fire, and at the same time the guy order his subordinate to push Leon down into the cliff.
Cue villainous monologue about how 'you're going to die here Bard Loen' and how his conspiracy will not be ruined by the likes of him etc etc.
Loen's new horse, also a horned one, used its body to cushioned the fall.
While Loen is having a moment of grief over his stead sacrificing itself to protect him or how dare the bastard killed such a nice stead just for this, his eyes and the lured horse met.
Basically he's about to get a new badass horse to ride :v