Cheapest priced copy (Tenth Edition): $0.35 at Card Kingdom, near mint, their price list as of .
Sea Monster 
Creature — Serpent · 6/6 · Common · Tenth Edition · #106
This creature can't attack unless defending player controls an Island.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
9 printings · $0.35 to $4.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Tenth Edition | 106 | Common | $0.35 | $0.49 |
| Classic Sixth Edition | 96 | Common | $0.35 | — |
| Seventh Edition | 97 | Common | $0.35 | — |
| Seventh Edition | 97★ | Common | — | $4.99 |
| Eighth Edition | 99 | Common | $0.35 | — |
| Eighth Edition | 99★ | Common | — | $0.49 |
| Ninth Edition | 96 | Common | $0.35 | — |
| Ninth Edition | 96★ | Common | — | $0.49 |
| Tempest | 85 | Common | $0.35 | — |