Cheapest priced copy (Marvel Super Heroes Commander): $0.49 at Card Kingdom, near mint, their price list as of .
Negative Zone Portal 
Artifact · Rare · Marvel Super Heroes Commander · #445
{2}, {T}: Exile target card from an opponent's graveyard. If it's a creature card, draw a card.
At the beginning of your upkeep, if there are four or more creature cards exiled with this artifact, flip a coin. If you lose the flip, sacrifice this artifact and return a card exiled with it at random to its owner's hand.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Marvel Super Heroes Commander | 111 | Rare | $0.49 | $0.49 |
| Marvel Super Heroes Commander | 445 | Rare | $0.49 | — |