Guild Wars 2

Any world boss will give me 2nd reward if I kill it twice?

You can loot the chest with the dragonite once per character each day, so if you are mainly after the dragonite .. just kill them with different chars

As Beldin says, you can do it on different chars, you only lose the bonus chest with rares that each boss gives.

You cant with single char like guys said. But 5 chars – 5 loots if you have time for that. Same with dungeons I think, right?