Moving, readying, and returning to hand are different
Stellacorn Herder · Ride the Wind · Tideturner
The Legend moves without readying. Ride the Wind moves and readies. Tideturner exchanges places with a unit you control at another location and does not ready either unit. Herder draws from those actual moves, but not from Star-Crossed returning it to hand or Hourglass recalling it to base. A ready Herder can move to a field for a card, then the Legend can move it back to base for another. That second move leaves it exhausted, and abandoning the field may give up a future Hold. The cards are only worth it if the position you leave is acceptable.
