Fell Horseman
{3}{B}Creature — Zombie Knight
When this creature dies, put it on the bottom of its owner's library.

Creature — Zombie Knight // Sorcery — Adventure
Creature — Zombie Knight
When this creature dies, put it on the bottom of its owner's library.
Sorcery — Adventure
Return target creature card from your graveyard to your hand. (Then exile this card. You may cast the creature later from exile.)
'Dies' means 'put into a graveyard from the battlefield.' If a creature is exiled instead of dying (Swords to Plowshares, Rest in Peace), dies triggers won't fire. Tokens do trigger 'dies' abilities briefly before ceasing to exist.