This can ultimately allow the player to potentially find a vital card that's necessary to win the game, whether through reducing the opponent's deck size, healing their Pokmon's health, or in Charizard's case, finding more Leon cards to discard to increase the damage output from Royal Blaze
You can also use the card to generate mana immediately, which has gotten other cards banned from formats in the past
This works especially well with your commanders second ability, since the creature copies are artifact creature tokens
Xorn lets you generate an extra treasure token every time you create one, making it useful as well
Ad Nauseam (Shards of Alara): This man works far too hard
It is pretty easy to remain functional after eating a load of LD from the Titan, especially if you are expecting it at all