Cheapest priced copy (Foundations): $0.49 at Card Kingdom, near mint, their price list as of .
Voracious Greatshark 
Creature — Shark · 5/4 · Rare · Ikoria: Lair of Behemoths Promos · #70p
Flash (You may cast this spell any time you could cast an instant.)
When this creature enters, counter target artifact or creature spell.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
6 printings · $0.49 to $2.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Foundations | 600 | Rare | $0.49 | — |
| Ikoria: Lair of Behemoths | 70 | Rare | $0.49 | $0.99 |
| Ikoria: Lair of Behemoths | 320 | Rare | $1.49 | $2.49 |
| Foundations Jumpstart | 382 | Rare | $0.49 | — |
| Ikoria: Lair of Behemoths Promos | 70p | Rare | $0.49 | $0.79 |
| Ikoria: Lair of Behemoths Promos | 70s | Rare | — | $1.29 |
One ruling from Wizards of the Coast
- 17 April 2020You can cast Voracious Greatshark without a target for its enters-the-battlefield triggered ability. That ability will simply not happen. It won't cause Voracious Greatshark to counter itself. It's not that hungry.