Form of the Stax Player [Unknown Event]

Set: Unknown Event Type: Enchantment Rarity: Rare Cost: {5}{W} At the beginning of your upkeep, create a random token that's a copy of one of the following:Aven Mindcensor, Drannith Magistrate, Ghostly Prison, Hushbringer, Smokestack, or Thalia, Guardian of Thraben. (There are six of them, so one easy way to select is to roll a D6.)When Form of the Stax Player leaves the battlefield, sacrifice each token created with it.