Dredge is really hard to do well though, in that it makes a card playable no matter what else is written on it, and making a card too playable, then adding dredge onto it can easily make it broken enough to pick up bans in eternal formats. It's such a small design space, but I'd also love to see a few cards try to thread that needle.

Buyback is fun, Clockspinning in particular stands out as a fun card to play, even if it's not amazing. Expanding it to creatures would be a fun twist to see it come back with.