Rider's Bond

When Rider's Bond comes into play, name two
creature cards.
Each gains Partner with the other. (When this
creature enters the battlefield, target player may
put the other into their hand from their library,
when shuffle.)
"They cannot been tamed or broken. No saddle can
make one yours. You must win its loyalty with your
heart and mind, for no bridle can restrain a thing so
strong and free." - Akroan Airquestrienne