"Classic Sixth Edition", +top, +library, +"onto the battlefield", +!manifest (2)
: Reveal the top card of your library. If it's a creature card, put it onto the battlefield. Otherwise, put it into your graveyard.
Destroy target creature. It can't be regenerated. Its controller reveals cards from the top of their library until they reveal a creature card. The player puts that card onto the battlefield, then shuffles all other cards revealed this way into their library.
Gatherer works better in the Companion app!