Leonin Iconoclast

Oracle Text

Heroic — Whenever you cast a spell that targets Leonin Iconoclast, destroy target enchantment creature an opponent controls.

Card Rulings

4/26/2014 Heroic abilities will resolve before the spell that caused them to trigger.
4/26/2014 Heroic abilities will trigger only once per spell, even if that spell targets the creature with the heroic ability multiple times.
4/26/2014 Heroic abilities won’t trigger when a copy of a spell is created on the stack or when a spell’s targets are changed to include a creature with a heroic ability.