Cheapest priced copy (Duskmourn: House of Horror): $14.99 at Card Kingdom, near mint, their price list as of .
Untimely Malfunction 
Instant · Uncommon · Duskmourn: House of Horror · #161
Choose one —
• Destroy target artifact.
• Change the target of target spell or ability with a single target.
• One or two target creatures can't block this turn.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
2 printings · $14.99 to $16.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duskmourn: House of Horror | 161 | Uncommon | $14.99 | $16.99 |
| The List | DSK-161 | Uncommon | — | — |
3 rulings from Wizards of the Coast
- 20 September 2024The effect of Untimely Malfunction's last mode won't cause creatures that are already blocking to stop blocking.
- 20 September 2024You don't choose the new target for the spell or ability targeted with Untimely Malfunction's second mode until Untimely Malfunction resolves. You must change the target if possible. However, you can't change the target to an illegal target. If there are no legal targets to choose from, the target isn't changed. It doesn't matter if the original target has somehow become illegal itself.
- 20 September 2024If a spell or ability targets multiple things, you can't target it with Untimely Malfunction's second mode, even if all but one of those targets have become illegal.