Knollspine Dragon
{5}{R}{R}
Creature — Dragon
Oracle Text
Flying
When this creature enters, you may discard your hand and draw cards equal to the damage dealt to target opponent this turn.
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.