Cheapest priced copy (Classic Sixth Edition): $0.35 at Card Kingdom, near mint, their price list as of .
Syphon Soul 
Sorcery · Common · Onslaught · #176
Syphon Soul deals 2 damage to each other player. You gain life equal to the damage dealt this way.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
6 printings · $0.35 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Classic Sixth Edition | 159 | Common | $0.35 | — |
| Battle Royale Box Set | 86 | Common | $0.79 | — |
| Conspiracy | 127 | Common | $0.35 | $0.79 |
| Planechase | 43 | Common | $0.35 | — |
| Legends | 118 | Common | $0.35 | — |
| Onslaught | 176 | Common | $0.35 | $0.99 |