A Whole New World, when timed correctly can refill your hand and force your opponent to discard cards that they probably want to use, cycling through their deck quicker, a staple card in Mill decks
Board Clears that Clear Multiple Permanent Types (Coastal Breach, Consuming Tide, Devastation Tide, Rivers Rebuke) Returning all nonland permanents to players hands is always going to have a huge impact during a game of Commander
Of course, you should prioritize the Deserts needed to guarantee getting the Zombie tokens
In addition to being a 4/4 with trample, this powerful card makes it easier to get other cards with adventures on the battlefield
The whole franchise could be regarded as one large multiverse, which is definitely something modern audiences are used to, so theres really no trouble there
In the case of a Universes Beyond set, there isnt a story to talk about