Because of the Adventure, you can really look at it as a potential 4-mana 2/2 that gets you a permanent back from your graveyard and that is also a card I would probably always play
Of course, there are more general ability doublers, like Fractured Realm and Echoes of Eternity
Ugin, meanwhile, isnt always asymmetrical, but can often be so, either because youre playing a lot of artifacts and colorless spells, or because youre sequencing up to casting him and not dropping too many resources into play
If you're playing a Commander like Roon of the Hidden Realm, Yarok, the Desecrated, or Gonti, Lord of Luxury, Panharmonicon will almost always not just find its way into your deck but be absurdly powerful in your deck
This card pumps and provides card draw whenever one of your ninjas deals combat damage to a player, which is usually the strategy for most ninja decks anyway
For Worldpurge, that means blinking a bunch of cards out of play, resolving this 8-mana sorcery, then being the only one left with a board when your cards re-enter