Popular Entertainer is a rare Legendary Enchantment — Background card from Commander Legends: Battle for Baldur's Gate (CLB), collector number 192. Current market price: $0.29 (foil $0.41), TCGplayer market prices via Scryfall.
Commander creatures you own have "Whenever one or more creatures you control deal combat damage to a player, goad target creature that player controls." (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.)
All Commander Legends: Battle for Baldur's Gate cards and prices