Cheapest priced copy (Ice Age): $0.69 at Card Kingdom, near mint, their price list as of .
Infernal Denizen 
Creature — Demon · 5/7 · Rare · Ice Age · #136
At the beginning of your upkeep, sacrifice two Swamps. If you can't, tap this creature, and an opponent may gain control of a creature you control of their choice for as long as this creature remains on the battlefield.
{T}: Gain control of target creature for as long as this creature remains on the battlefield.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.69 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ice Age | 136 | Rare | $0.69 | — |
2 rulings from Wizards of the Coast
- 4 October 2004You should always have one creature for your opponent to take (i.e. the Denizen). If by chance you have no creature for your opponent to take, then they don’t get one. Remember that taking a creature is optional so your opponent is not forced to take the Denizen.
- 4 October 2004You must sacrifice the Swamps if you can. You can’t choose not to pay if you have them.