The downside is, unless you actively want to be dumping your hand into the graveyard, you need creatures with high power in order to make Greater Good worth it
However, even with just one opponent, that player will draw four cards, so that ends up being a total net loss of one card for you, which means Prosperity with X=4 was not card advantage
However, Murktide Regent is in many ways a homage to creatures from back in the day, as the dragon simply is just a very big creature
A 5/4 with first strike for five is already a good deal, but her follow-up ability is even better
Lorcana decks are interesting in that they can only ever have two colours of ink , and the different inks all have their own distinct identities that fans of Magic will immediately recognise, but what they actually do doesnt map as clearly to each ink as youd expect