Usually players will have to choose another card with the same character to use Shift, but in the case of Chip n Dale, Recovery Rangers, it can be used to Shift a Chip or a Dale card, which makes it quite a bit more versatile than a normal Floodborn card
By the by, she's also one of the engines that makes my Equinaut deck run, so I have played a veritable ton of cards with her over the years in the same deck
I love Bewildering Blizzard, and think its only time before everyone else comes around on it too
Across the 636 cards in those three sets, there were only 21 Uncommon legendary permanents
There are plenty of ways to make it happen, however, whether its just playing creatures with Flash or bringing in creatures via Ninjutsu abilities