Symmetry Matrix
{4}
Artifact
Oracle Text
Whenever a creature you control with power equal to its toughness enters, you may pay {1}. If you do, draw a card.
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.