Cheapest priced copy (Double Masters 2022): $3.99 at Card Kingdom, near mint, their price list as of .
Dragonlord Silumgar 
Legendary Creature — Elder Dragon · 3/5 · Mythic · Dragons of Tarkir · #220
Flying, deathtouch
When Dragonlord Silumgar enters, gain control of target creature or planeswalker for as long as you control Dragonlord Silumgar.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
5 printings · $3.99 to $399.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters 2022 | 203 | Mythic | $3.99 | $5.99 |
| Double Masters 2022 | 488 | Mythic | — | — |
| Dragons of Tarkir | 220 | Mythic | $4.49 | $9.99 |
| Dragons of Tarkir Promos | 220s | Mythic | — | $6.49 |
| Secret Lair Promo | 9 | Mythic | $19.99 | $399.99 |
3 rulings from Wizards of the Coast
- 25 February 2015If another player gains control of Dragonlord Silumgar, its control-change effect ends. Regaining control of Dragonlord Silumgar won't cause you to regain control of the creature or planeswalker.
- 25 February 2015If Dragonlord Silumgar ceases to be under your control before its ability resolves, you won't gain control of the creature or planeswalker at all.
- 25 February 2015If Dragonlord Silumgar leaves the battlefield, you no longer control it, and its control-change effect ends.