There are also cards like RMS Titanic that sacrifice themselves when they deal combat damage, and others like Combat Celebrant that basically always tradethis commander does some cool stuff
So, if you are looking to add Prince Naveen, Ukulele Player to your deck and use him in your matches, the regular Legendary card will be the cheaper choice
Legendary Creature - Dwarf Warlock Creature (CTRL to add secondary) Draw/Advantage Angelic Sell-Sword Flying, vigilance Whenever this creature or another nontoken creature you control enters, create a 1/1 red Mercenary creature token with ": Target creature you control gets +1/+0 until end of turn
Assassins also count as outlaws, which have their own payoffs, especially within Outlaws of Thunder Junction and the OTC Commander precons
It can be a win condition for elf decks, but its just blanket protection for green-heavy lists
While its effect may seem similar to cards like Agent of Treachery, Clever Impersonator is played in a very different way, usually being used to copy one of your own permanents, rather than steal a permanent from an opponent