Cheapest priced copy (Dragons of Tarkir): $9.99 at Card Kingdom, near mint, their price list as of .
Dragonlord Kolaghan 
Legendary Creature — Elder Dragon · 6/5 · Mythic · Dragons of Tarkir · #218
Flying, haste
Other creatures you control have haste.
Whenever an opponent casts a creature or planeswalker spell with the same name as a card in their graveyard, that player loses 10 life.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
3 printings · $9.99 to $22.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Dragons of Tarkir | 218 | Mythic | $9.99 | $22.99 |
| Dragons of Tarkir Promos | 218s | Mythic | — | $9.99 |
| Secret Lair Drop | 1269 | Mythic | — | $12.99 |
2 rulings from Wizards of the Coast
- 25 February 2015If an opponent casts a creature spell with delve and exiles all cards from their graveyard with the same name to help pay its cost, Dragonlord Kolaghan’s ability won’t trigger.
- 25 February 2015Casting a spell face down won’t cause Dragonlord Kolaghan’s last ability to trigger. A spell with no name can’t have the same name as any other card.