Youthful Valkyrie
{1}{W}
Creature — Angel
Oracle Text
Flying
Whenever another Angel you control enters, put a +1/+1 counter on this creature.
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.