Cheapest priced copy (Teenage Mutant Ninja Turtles Eternal): $0.59 at Card Kingdom, near mint, their price list as of .
Rat King, Pale Piper 
Legendary Creature — Rat Avatar · 3/3 · Rare · Teenage Mutant Ninja Turtles Eternal · #19
Menace
Whenever Rat King or another nontoken creature you control leaves the battlefield, create a 1/1 black Rat creature token.
{2}, Sacrifice a token: Draw a card.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.59 to $8.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Teenage Mutant Ninja Turtles Eternal | 19 | Rare | $0.59 | $8.99 |