it just causes the ability to trigger an additional time
Besides its art, Belle, Hidden Archer is also a great emerald card thanks to its gameplay mechanics
Woody, Leader of the Toys, for example, can look for another Character or for Andy's Room Location when Played
Sticking life loss in your mana base makes your deck incredibly consistent since you need to fix your mana anyways
HeiHei is the best card in the Might and Magic dec k, returning to hand each time the Dreamborn is banished
You should also check out Kristen Gregorys article from earlier this year, Why Voltron Isnt Viable in Casual Commander, which I would recommend for an insightful, additional perspective on the subject matter