Mnemonic Wall
{4}{U}
Creature — Wall
Oracle Text
Defender
When this creature enters, you may return target instant or sorcery card from your graveyard to your hand.
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.