A mox start lets you build up a surge of mana and unleash powerful spells before your opponent has the option of mounting a defense - not counting all the other snazzy things you can trigger by casting an artifact
Dualcaster Mage is the easier card to go infinite with, since it doesn't require being cast to copy spells like Ghostly Flicker, though the otters still great as just a body that doubles up on another spell you're casting
Though this combo only flickers one creature, there is a lot that can be done with it
- Wield magic inks and the power of Lorcana to assemble your team of Disney characters
Is it Still 10 Poison Counters
Finally, it has the Welcome Return ability, which states that whenever this character quests, you may return a chosen character of yours with a cost of one to your hand (from your discard pile), and if you do, you may play a character with a cost of one ink for free