Despite being an uncommon, Shoreline Looter occupies this space best now, giving you full unblockability and the ability to keep the cards you draw once you hit threshold, which it actively works towards
Its extremely versatilesometimes it protects your creatures, sometimes it removes blockers, and probably most often, it answers any number of stax-type creatures that are interfering with your plans long enough for you to win
Runic Armasaur
Basalt Monolith and Grim Monolith come to mind
Having the bookworm eat cards from your opponent's hand is kind of flavourful, though I'm honestly not quite sure where the flavour is in having this effect happen when the Bookworm itself dies
Prerelease promos like Tyrantrum and Serperior have already demonstrated flip potential, and the sets Illustration Rare density plus solid SIR pull rates make both booster boxes and ETBs attractive