
Creature — Nightstalker
Whenever this creature attacks and isn't blocked, defending player discards a card.
2/2
Wyrm hasn't broken down this card yet — check back soon.
Wyrm hasn't mapped related cards for this one yet — check back soon.
An ability that triggers when something "attacks and isn't blocked" triggers in the declare blockers step after blockers are declared if (1) that creature is attacking and (2) no creatures are declared to block it. It will trigger even if that creature was put onto the battlefield attacking rather than having been declared as an attacker in the declare attackers step.