River Sneak
{1}{U}
Creature — Merfolk Warrior
Oracle Text
This creature can't be blocked.
Whenever another Merfolk you control enters, this creature gets +1/+1 until end of 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.