Cheapest priced copy (Ultimate Masters): $0.35 at Card Kingdom, near mint, their price list as of .
Hero of Leina Tower 
Creature — Human Warrior · 1/1 · Uncommon · Ultimate Masters · #169
Heroic — Whenever you cast a spell that targets this creature, you may pay {X}. If you do, put X +1/+1 counters on this creature.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Born of the Gods | 123 | Rare | $0.49 | $0.49 |
| Ultimate Masters | 169 | Uncommon | $0.35 | $0.49 |
4 rulings from Wizards of the Coast
- 15 September 2013Heroic abilities will trigger only once per spell, even if that spell targets the creature with the heroic ability multiple times.
- 15 September 2013Heroic abilities will resolve before the spell that caused them to trigger.
- 15 September 2013Heroic 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.
- 7 December 2018The amount to pay for {X} is chosen as the triggered ability resolves. No player may take actions between the time you pay {X} and the time Hero of Leina Tower has X +1/+1 counters on it.