Cheapest priced copy (The List): $27.99 at Card Kingdom, foil, near mint, their price list as of .
Marrow-Gnawer 
Legendary Creature — Rat Rogue · 2/3 · Rare · Champions of Kamigawa · #124
All Rats have fear.
{T}, Sacrifice a Rat: Create X 1/1 black Rat creature tokens, where X is the number of Rats you control.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
6 printings · $27.99 to $74.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Bloomburrow Commander | 79 | Rare | $29.99 | $29.99 |
| Champions of Kamigawa | 124 | Rare | $32.99 | $74.99 |
| Hachette UK | 1 | Rare | — | — |
| The List | CHK-124 | Rare | — | $27.99 |
| Salvat 2005 | A1 | Rare | — | — |
| Secret Lair Drop | 34 | Rare | — | $37.99 |
One ruling from Wizards of the Coast
- 1 December 2004Marrow-Gnawer's ability counts the number of Rats on the battlefield when it resolves, so you don't count the sacrificed Rat.