Liu Bei, Lord of Shu is a rare Legendary Creature — Human Soldier card from Portal Three Kingdoms (PTK), collector number 11. Current market price: $36.31, TCGplayer market prices via Scryfall.
Horsemanship (This creature can't be blocked except by creatures with horsemanship.) Liu Bei gets +2/+2 as long as you control a permanent named Guan Yu, Sainted Warrior or a permanent named Zhang Fei, Fierce Warrior.