You can only use 1 "Arcana Spread" effect per turn, and only once that turn
Our example focuses on an assortment of main deck monsters and spells no trap cards
Improvise is like a convoke-shifted version of affinity, which you can argue makes it fair
Once per turn, you can change this card's ATK to twice its original ATK
Return to Ravnica was also notable for producing one of the most absurd Limited cards in Pack Rat, but its the Shaman that defined Return to Ravnica for me: intriguing on the page, domineering on the table
Then, to reward you for all your spell casting, Lord of the Nazgl turns all your instants and sorceries into 3/3 Wraith creatures, that have the chance to become 9/9s once you have nine of them