Cheapest priced copy (Battle for Zendikar): $0.49 at Card Kingdom, near mint, their price list as of .
Ugin's Insight 
Sorcery · Rare · Battle for Zendikar · #87
Scry X, where X is the greatest mana value among permanents you control, then draw three cards.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
3 printings · $0.49 to $2.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Battle for Zendikar | 87 | Rare | $0.49 | $0.49 |
| Modern Horizons 3 Commander | 196 | Rare | $0.49 | $0.49 |
| Battle for Zendikar Promos | 87s | Rare | — | $2.49Out of stock |
2 rulings from Wizards of the Coast
- 25 August 2015Use the highest mana value among permanents you control as Ugin's Insight resolves to determine how many cards you scry.
- 25 August 2015If X is 0, you won't scry at all. Any abilities that trigger whenever you scry won't trigger.