Leshrac's Emissary

Reach
Discard a card: Regenerate Leshrac's Emissary.
When Leshrac's Emissary enters the battlefield,
if you own creature card named Leshrac's Paladin
and Leshrac's Lieutenant in exile, onto the battlefield or in your graveyard, you may search
your library for a card named Leshrac, Walker of Night, reveal it, put it into your hand, then
shuffle your library.