Predatory Nightstalker
{3}{B}{B}
Creature — Nightstalker
Oracle Text
When this creature enters, you may have target opponent sacrifice a creature of their choice.
Watch Out
ETB trigger, not a cast triggerRules Note
This card's ability triggers when it enters the battlefield, not when it's cast. Effects that double ETB triggers (like Panharmonicon) work here. Countering the spell prevents the creature from entering, so the ETB won't fire.