Cheapest priced copy (Fate Reforged): $0.49 at Card Kingdom, near mint, their price list as of .
Yasova Dragonclaw 
Legendary Creature — Human Warrior · 4/2 · Rare · Fate Reforged · #148
Trample
At the beginning of combat on your turn, you may pay {1}{U/R}{U/R}. If you do, gain control of target creature an opponent controls with power less than Yasova Dragonclaw's power until end of turn, untap that creature, and it gains haste until end of turn.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.49 to $3.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Fate Reforged | 148 | Rare | $0.49 | $0.49 |
| Fate Reforged Promos | 148s | Rare | — | $3.49 |
2 rulings from Wizards of the Coast
- 24 November 2014The powers of the target creature and Yasova Dragonclaw are checked as you put the ability on the stack and again as the ability resolves. Once the ability resolves, it doesn’t matter what happens to either creature’s power.
- 24 November 2014Gaining control of a creature doesn’t cause you to gain control of any Auras or Equipment attached to it.