A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.
Had this come up in a game.
Playing against a guy running Mantis "the last one deck" with my spider deck.
I hit his Last One with nerve strike and reduce his force to 0 and he cannot perform actions. He tries to move home with Ring of Water. Are you able to use RoW to move home or is that considered performing an action?
Hopefully you guys can help me out on this one.
Battle: Bow this card or discard it from your hand: Move your target unit home or to a battlefield with one or more enemy units. If the unit moved, straighten it.
Nobody performs an action if it targets only as an effect (that is, isn't printed between two colons) or doesn't target.
See how there is no targeting between the first two colons? This action isn't printed on a personality, nor on an item or spell attached to a personality, nor on a follower. Therefore, nobody performs this action. They may indeed run home via Ring of Water after being Nerve Strike'd.