Cheapest priced copy (Foundations Commander): $0.79 at Card Kingdom, near mint, out of stock, their price list as of .
Warstorm Surge 
Enchantment · Rare · Forgotten Realms Commander · #149
Whenever a creature you control enters, it deals damage equal to its power to any target.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
16 printings · $0.79 to $12.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Warhammer 40,000 Commander | 209 | Rare | $1.49 | — |
| Warhammer 40,000 Commander | 209★ | Rare | — | — |
| Forgotten Realms Commander | 149 | Rare | $1.79 | — |
| Bloomburrow Commander | 117 | Rare | $1.29 | — |
| Commander 2013 | 129 | Rare | $0.99 | — |
| Commander 2015 | 171 | Rare | $1.29 | — |
| Commander 2019 | 155 | Rare | $0.99 | — |
| Commander Legends: Battle for Baldur's Gate | 815 | Rare | $1.29 | — |
| Commander Anthology Volume II | 129 | Rare | $1.29 | — |
| Foundations Commander | 186 | Rare | $0.79Out of stock | — |
| Magic 2012 | 160 | Rare | $1.49 | $10.99 |
| New Capenna Commander | 277 | Rare | $0.79 | — |
| Planechase 2012 | 54 | Rare | $1.99 | — |
| Planechase Anthology | 54 | Rare | $1.49 | — |
| Media and Collaboration Promos | 2026-6 | Rare | — | $12.99 |
| Avatar: The Last Airbender Eternal | 38 | Mythic | $1.79 | $3.49 |
2 rulings from Wizards of the Coast
- 22 September 2011Warstorm Surge is the source of the ability, but the creature is the source of the damage. The ability couldn't target a creature with protection from red, for example. It could target a creature with protection from creatures, but all the damage would be prevented. Since damage is dealt by the creature, abilities like lifelink, deathtouch and infect are taken into account, even if the creature has left the battlefield by the time it deals damage.
- 22 September 2011The creature that entered deals damage equal to its current power to the targeted permanent or player. If it's no longer on the battlefield, its last known existence on the battlefield is checked to determine its power.