Cheapest priced copy (Journey into Nyx): $9.49 at Card Kingdom, near mint, their price list as of .
Sage of Hours 
Creature — Human Wizard · 1/1 · Mythic · Journey into Nyx · #50
Heroic — Whenever you cast a spell that targets this creature, put a +1/+1 counter on it.
Remove all +1/+1 counters from this creature: For each five counters removed this way, take an extra turn after this one.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $9.49 to $44.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Journey into Nyx | 50 | Mythic | $9.49 | $44.99 |
| Secret Lair Drop | 2868 | Mythic | $13.99 | $14.99 |
4 rulings from Wizards of the Coast
- 26 April 2014Heroic 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.
- 26 April 2014Heroic abilities will resolve before the spell that caused them to trigger.
- 26 April 2014You must remove all +1/+1 counters from Sage of Hours to activate its ability, even if the number of counters isn't a multiple of five. For example, if you remove twelve counters to activate the ability, you'll take two extra turns. If you remove three counters, you won't take any extra turns.
- 26 April 2014Heroic abilities will trigger only once per spell, even if that spell targets the creature with the heroic ability multiple times.