Marcy: Another non-legendary token creator, with rebound, means you can play around with token shenanigans a bit with this card
Then you can fire off again on your turn via Sanctum of Ugin or Grapple with the Past if they answered that sweep
I don't like this design philosophy, certainly - I'd like there to be more good rogue decks at least - but there's not much motivation for Creatures to change
What Are The Key Features of Twilight Masquerade
Credits meanwhile have a singularly focused goal, allowing the player to trade them in for new cards, or new appearances for cards, and are earned by opening duplicates
So if you like the idea of a Tokens deck like Rhys the Redeemed but with a Cat Tribal theme, then swapping Arahbo, Roar of the World for Mirri, Weatherlight Duelist is a simple yet highly effective way to start on that route