Cheapest priced copy (Commander 2018): $0.69 at Card Kingdom, near mint, their price list as of .
Mimic Vat 
Artifact · Rare · New Capenna Commander · #372
Imprint — Whenever a nontoken creature dies, you may exile that card. If you do, return each other card exiled with this artifact to its owner's graveyard.
{3}, {T}: Create a token that's a copy of a card exiled with this artifact. It gains haste. Exile it at the beginning of the next end step.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
7 printings · $0.69 to $16.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2018 | 209 | Rare | $0.69 | — |
| Commander 2019 | 219 | Rare | $1.29 | — |
| Commander 2020 | 246 | Rare | $0.69 | — |
| The Lost Caverns of Ixalan Commander | 115 | Rare | $7.49 | $16.99 |
| New Capenna Commander | 372 | Rare | $0.79 | — |
| The List | C19-219 | Rare | $0.79 | — |
| Scars of Mirrodin | 175 | Rare | $0.99 | $8.99 |
14 rulings from Wizards of the Coast
- 1 January 2011Any "enters" abilities of the exiled card will trigger when the token is put onto the battlefield. Any "as [this permanent] enters" or "[this permanent] enters with" abilities of the exiled card will also work.
- 1 January 2011If the exiled card has {X} in its mana cost (such as Protean Hydra), X is considered to be 0.
- 1 January 2011Exiling the card as the first ability resolves is optional. If you choose not to exile it, or you can't exile it because the card has somehow left the graveyard before the ability resolves, the ability simply doesn't do anything as it resolves. Any card currently exiled by Mimic Vat remains exiled.
- 1 January 2011If the token isn't exiled when the delayed triggered ability resolves (due to Stifle, perhaps), it remains on the battlefield indefinitely. It continues to have haste.
- 1 January 2011You may exile a noncreature card with Mimic Vat's first ability. For example, if a nontoken artifact that's become a creature is put into a graveyard from the battlefield, Mimic Vat's first ability triggers and you may exile that card.
- 1 January 2011The token is exiled at the beginning of the next end step regardless of who controls it at that time, whether the exiled card is still exiled at that time, or whether Mimic Vat is still on the battlefield at that time.
- 1 January 2011If multiple nontoken creatures are put into their owners' graveyards from the battlefield at the same time, the imprint ability will trigger that many times. You put the triggered abilities on the stack in any order, so you'll determine in which order they resolve. However, since exiling those cards is optional, and choosing to exile a card this way causes the previously exiled cards to return to their owners' graveyards, the order generally doesn't matter: You'll wind up with at most one of those cards exiled, and the rest will be in the appropriate graveyards.
- 1 January 2011You may activate the second ability even if no card has been exiled with Mimic Vat. If no card has been exiled with Mimic Vat by the time the ability resolves, no token will be created.
- 1 January 2011The imprint ability will trigger whenever a nontoken creature is put into any graveyard from the battlefield, not just your graveyard.
- 1 January 2011The token created by the second ability will be a copy of whatever card is exiled with Mimic Vat at the time the ability resolves. This might not be the same card that was exiled with Mimic Vat at the time the ability was activated. It also might not be a creature card.
- 1 January 2011If Mimic Vat's second ability is activated during a turn's end step, the token will be exiled at the beginning of the following turn's end step.
- 1 January 2011If the token is a copy of a noncreature card, it will still have haste, though that won't matter unless that token somehow becomes a creature.
- 13 July 2016If a melded permanent dies and triggers Mimic Vat's triggered ability, both of its component cards are exiled. As Mimic Vat's second ability resolves, its controller chooses one of those cards to make a token copy of.
- 13 July 2018If the creature that dies is an instant or sorcery card that's been manifested, Mimic Vat may have a nonpermanent card exiled. You can't create a token that's a copy of a nonpermanent card. No token is created in this case.