Corbin, Guildpact Rogue

Human creatures you control have swampwalk.
Whenever a Rogue you control deals combat damage to an opponent, draw a card. If that creature was a Human, that player discards a card.
{3}{u/b}{u/b}{u/b}: Target opponent exiles the top card of their library until they exile a nonland card. You may cast that card without paying its mana cost. Only activate this ability if an opponent lost life this turn.