Spreading Plague
{4}{B}
Enchantment
Oracle Text
Whenever a creature enters, destroy all other creatures that share a color with it. They can't be regenerated.
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.