Annie Joins Up is a rare Legendary Enchantment card from Outlaws of Thunder Junction (OTJ), collector number 347. Current market price: $7.07 (foil $9.69), TCGplayer market prices via Scryfall.
When Annie Joins Up enters, it deals 5 damage to target creature or planeswalker an opponent controls. If a triggered ability of a legendary creature you control triggers, that ability triggers an additional time.