Shield-Wall Sentinel
{4}
Artifact Creature — Golem
Oracle Text
Defender
When this creature enters, you may search your library for a creature card with defender, reveal it, put it into your hand, then shuffle.
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.