Cards that replace themselves in your hand or give you Treasure as part of their abilities are good to consider, since youll need some form of ramp to keep casting three spells per turn
The Enchanted cards in Azurite Sea have a stylised, sepia toned look, with line drawings that ape the aesthetic of old maps, which is definitely in keeping with the nautical, piratical theme of the set, and there are 18 cards in all: What Characters Are Making Their Debut In Azurite Sea
That being said, its also worth discussing the new set as a separate entity to everything else
The Mystical Archive will print 63 spells into new alternate art variants, and three have already been revealed: Swords to Plowshares, Opt, and Demonic Tutor
Urabrask was dismembered by those serving Norn in episode six of the March of the Machine story
Finally, a set where I'm happy to play red and white