Cheapest priced copy (Foundations Commander): $2.29 at Card Kingdom, near mint, their price list as of .
Scourge of Valkas 
Creature — Dragon · 4/4 · Mythic · Magic 2014 · #151
Flying
Whenever this creature or another Dragon you control enters, it deals X damage to any target, where X is the number of Dragons you control.
{R}: This creature gets +1/+0 until end of turn.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
9 printings · $2.29 to $69.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Forgotten Realms Commander | 137 | Mythic | $4.99 | — |
| Commander 2017 | 142 | Mythic | $5.49 | — |
| Foundations Commander | 174 | Rare | $2.29 | — |
| Iconic Masters | 145 | Rare | $4.49 | $12.99 |
| Magic 2014 | 151 | Mythic | $5.49 | $15.99 |
| MagicFest 2025 | 14 | Rare | — | $7.49 |
| Starter Commander Decks | 157 | Mythic | $4.49 | — |
| Secret Lair Drop | 1490 | Mythic | $59.99 | — |
| Secret Lair Drop | 1490★ | Mythic | — | $69.99 |
2 rulings from Wizards of the Coast
- 17 November 2017The amount of damage dealt by the Dragon that entered the battlefield is based on the number of Dragons you control when the ability resolves.
- 17 November 2017If a Dragon entering the battlefield causes Scourge of Valkas's ability to trigger but leaves the battlefield before that ability resolves, that Dragon still deals damage.