They have a shimmering foil pattern (ink wash) to them which other cards don't and have their own unique art that is a cut above the rest
Regardless, Mickey's action shot and determined expression show his capability in inspiring those around him in this artwork by Maria Zafrilla
If you are capable of healing your cards, through items, actions, or character abilities, and Beast, Tragic Hero has damage on them at the start of your turn, you can let them attack and then heal them, allowing you to still benefit from the increased strength but keeping them healthy enough to stick around
Legendary cards are the strongest and most powerful cards in the game, and although they won't break a game, they are still highly coveted for ambitious competition
The earlier a player can get to high-cost Characters, the better a shot they have at winning against the other two Lorcana starters