Cheapest priced copy (The Dark): $0.49 at Card Kingdom, near mint, their price list as of .
Giant Shark 
Creature — Shark · 4/4 · Common · The Dark · #29
This creature can't attack unless defending player controls an Island.
Whenever this creature blocks or becomes blocked by a creature that has been dealt damage this turn, this creature gets +2/+0 and gains trample until end of turn.
When you control no Islands, sacrifice this creature.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
1 printing · $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| The Dark | 29 | Common | $0.49 | — |
4 rulings from Wizards of the Coast
- 4 October 2004The bonus happens when a previously damaged creature becomes a blocker and the bonus is not removed if that creature is removed from the blocking situation by any means.
- 4 October 2004Giant Shark only gains its bonus if the blocking creature was damaged before blocking was declared. Damaging the creature later will not give the Shark the bonus.
- 4 October 2004Giant Shark gets the bonus once for each creature it blocks or is blocked by that meets the criteria.
- 4 October 2004If a creature enters a blocking situation with the Giant Shark due to being part of a banded group of attackers, the Shark will get the bonus if that creature is damaged at that time.