Prodigious Guide

Grace {w}{g} (Whenever a player casts a nonceartue spell, you may pay {w}{g}. If you do, attach this card to that spell's controller. It becomes an Aura.)
If Prodigious Guide is attached to a player, it gains "At the beginning of echanted player's upkeep, they may pay {1}{g}. If they do, they search their deck for a creature card and put it in their hand. Then, enchanted player shuffles their library."