When Caradora enters, you may search your library for a Mount or Vehicle card, reveal it, put it into your hand, then shuffle.
If one or more +1/+1 counters would be put on a creature or Vehicle you control, that many plus one +1/+1 counters are put on it instead.
If you somehow control multiple copies of Caradora, they would each increase the number of +1/+1 counters put on a creature or Vehicle you control by one.
7 Feb 2025
If two or more effects attempt to modify how many counters would be put on a permanent you control, you choose the order to apply those effects, no matter who controls the sources of those effects.
7 Feb 2025
If a creature or Vehicle you control would enter the battlefield with a number of +1/+1 counters on it, it enters with that many plus one instead.