Cyclopean Snare just taps a creature, both Puppet Strings and Icy Manipulators have better taps for less than 3 mana (one can untap creatures, the other can tap down non-creatures as well)
Currently, we are restricting these changes to digital-only cards, where there will be no conflict between a digital and printed version of a card
For the most part, this is the only color pair that cares about artifacts, so you'll be able to get the key cards from the deck mostly unimpeded
This is especially true of hard tomove cards, oddities and foils, low-end rares, and most commons and uncommons (with the exception of hot tournament staples)
You can play one of these either as a Clearwater Pathway and be able to generate blue mana, or as Murkwater Pathway, a land that generates black mana