Caring Owlbear

When Caring Owlbear comes into play, put two green 1/1 Owlbear cub tokens into play. These tokens are considered to have a mana cost equal to {g}.
{g}{g},{t}: Mature target green Young creature (To mature this creature, exile it. If you do, search your library for a non-Young creature card that shares a creature type with it. You may cast it by paying the difference in mana costs between it and this creature. Then shuffle your library.)