Guild Wars 2

To make the Thief truly a Thief, this seems like a decent things to add…

When a Thief downs an opponent, the Thief steals all active boons from that target.

Then this means that Thief has to grant all boons on him to whoever kills him. Since Thief doesn’t get boons on his own, this can only be in our favor

The Thief is the only profession that claims to be a thief :-P