You 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.
2024-09-20
wotc
The effect of Untimely Malfunction's last mode won't cause creatures that are already blocking to stop blocking.
2024-09-20
wotc
If 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.
Format Legality
Standard
Legal
Future
Legal
Historic
Legal
Timeless
Legal
Gladiator
Legal
Pioneer
Legal
Modern
Legal
Legacy
Legal
Pauper
Not Legal
Vintage
Legal
Penny
Not Legal
Commander
Legal
Oathbreaker
Legal
Standardbrawl
Legal
Brawl
Legal
Alchemy
Legal
Paupercommander
Not Legal
Duel
Legal
Oldschool
Not Legal
Premodern
Not Legal
Predh
Not Legal
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