Kethis, the Hidden Hand It doesnt look exactly like an elf-typal commander, and it certainly doesnt have to be, but Kethis, the Hidden Hand takes advantage of the raw number of powerful legendary elves in this color identity
But because they can't Meld, the Token will disappear because it changed zones, and the other one will simply stay in Exile
In this cards case it actually can get bigger and might be a great fit in your spellslinging EDH deck
The only thing that keeps him from being one of the most powerful creatures of all time is that most multiplayer games these days start with enough life to essentially half his power and usefulness
You prowess-buff your squad, of course, but that ability to either copy a spell or loot after combat gives a ton of flexibility and options for top-deck windfalls
or it reduces them, which means you lose lifes