The Keeper of Favorite Cards 
Legendary Creature — Human Soldier
When The Keeper of Favorite Cards enters the battlefield or attacks, name a nonland card and write it on your favorites list for this game. (You can have limitless favorites.) Your favorite creatures get +1/+0. Whenever you cast a favorite noncreature spell, create a 1/1 white Soldier creature token.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL