Heroic — Whenever you cast a spell that targets this creature, you may pay . If you do, put X +1/+1 counters on this creature.
"You cannot achieve greatness if its seed has not already been planted in your heart."
(15/09/2013)
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.
(07/12/2018)
The amount to pay for is chosen as the triggered ability resolves. No player may take actions between the time you pay and the time Hero of Leina Tower has X +1/+1 counters on it.
(15/09/2013)
Heroic abilities will resolve before the spell that caused them to trigger.
(15/09/2013)
Heroic abilities will trigger only once per spell, even if that spell targets the creature with the heroic ability multiple times.