I Princed an amulet and then a walled village. Both worked for a while and then disappeared off my mat. I believe these two cards were shuffled back into my deck. No sign of the princes. I did not get the game number but was playing around 10:15 Pm EST on a samsung tablet.
Both of these are cards that are dangerous to play with Prince.
You probably topdecked your Walled Village, as per its effect. When you do this, it leaves play and thus leaves the Prince alone in play.
Duration cards don't work well with Prince at all. They get split up when it lingers in play for the duration effect.
And now you know!
Ok, good to know. Thanks.