I settled for Iteration because I think it is even better at what it does in Izzet Murktide, than what Wrenn and Six does in the 4-color decks
To say I went through a lot of solutions like this is an understatement
Whos version is at $4, Fallout at $10
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
The first-edition base set, comprising all 103 cards evaluated at a perfect 10 by grading company PSA, sold for almost $100,000 at auction in 2017 - among the most money paid for the Pokmon TCG at the time
As a result, we often found ourselves in a position where we had the win (in the form of Enduring Ideal) in hand but were a mana or two short of actually casting our game-winning spell