Interplanar Brushwagg - No Symbol (CMB2) from Mystery Booster Playtest Cards 2021, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: John Penick
• Card Text:
  Interplanar (This creature enters onto the interplanar beattlefield. Players can’t control creatures on the interplanar battlefield.)
  Vigilance, haste
  Whenever a player attacks with a creature with power 4 or greater, CARDNAME also attacks the player or planeswalker that creature is attacking.