Resolves YES if any vintage-legal new card is printed that references the "banding" keyword in its rules text. Reprints of existing cards don't count.
@Conflux Ugh. I wanted to say it's a sure bet they won't but yeah, maybe they'll revive it for a literal Voltron set or something. I hate having to deal with these things in casual formats now.
@IsaacKing: Well, phasing is an interesting case. They haven't printed any new cards with phasing. What they have printed is a bunch of new cards that can phase things out as a one-off. So would the equivalent case here count? Say a sorcery that says "Choose any number of target creatures. The next time those creatures attack this turn, they attack as a band." Would you say that "references the banding keyword"?
@AlexChurchill Nice to meet you! I loved the paper.
If you're interested, there's a Discord server for discussion of the overlap between Magic and mathematics; implementation of Turing machines, the "deal the largest amount of damage" contest, etc. You'd be more than welcome to join. :)