15 Sept 2013
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.
15 Sept 2013
Only creatures you control when the heroic ability resolves will get the bonuses. Creatures that come under your control later in the turn will not.
15 Sept 2013
Heroic abilities will resolve before the spell that caused them to trigger.
15 Sept 2013
Heroic abilities will trigger only once per spell, even if that spell targets the creature with the heroic ability multiple times.