Squee

Pure information, no clock, no board: the controller of this avatar simply gets to see what the opponent is holding for the rest of the game. That is the whole effect, and it is a telling one. Vanguard cards were avatars you selected before the game began, altering your hand size, life total, or rules of engagement for the entire match rather than going onto the battlefield as a permanent. Most of them handed out raw stats. This one, named for Squee, Goblin Nabob, the recurring goblin who became a fan mascot for refusing to stay dead, leans into the joke by giving its controller knowledge instead of power: the opponent plays open-handed. It is an asymmetric perfect-information knob with no tempo and no presence on the board, which is precisely the sort of design lever the format existed to test. Nothing in modern Magic occupies this slot, because Vanguard never crossed into tournament legality, and the avatar idea was eventually absorbed in diluted form into things like the Commander zone and the Companion mechanic. As a curiosity, it documents Wizards mapping where a card could "live" if it lived nowhere on the battlefield at all.