Ersta, Friend to All

+1: Create a 1/1 Human Wizard creature token that's all colors.
-3: Choose a card name from this list: Enlightened Tutor, Mystical Tutor, or Worldly Tutor. Copy that spell and cast it without paying its mana cost.
-8: You get an emblem with: "At the beginning of your upkeep, if you control twenty or more Wizards, you win the game."