Someone brought this up on the L5R subreddit and it got me thinking. Can Bayushi Yunako swap the skill value of a character with a dash (ex. Moto Horde)? Per the RR:
"If a character has a dash for a skill value, that skill value cannot be modified or otherwise changed by card abilities and effects."
Does Yunako trading skill values constitute a modification or change in that sense? The consensus on reddit was that this is an illegal play, but I feel like I've seen it done/discussed on here before, and yet I can't find any proof of that now.