And Lotus Petal showed that even making a single extra mana for free is pretty bonkers
Twinflame Tyrant Far Fortune, End Boss Ojer Axonil, Deepest Might / Temple of Power Imodane, the Pyrohammer Solphim, Mayhem Dominus And there are some other good options in mono-red likeNeheb, the Eternal and Toralf, God of Fury / Toralf's Hammer as well as nice cards that add a color, like Tor Wauki the Younger, Firesong and Sunspeaker, and Ghyrson Starn, Kelermorph
What we really wanted to capture was the feeling of the Obscura, Verhey tells me, and the Obscura in New Capenna can get in any locked door, they know all the secrets, and it was a great fit for Saboteurs. That means youll be sneaking creatures past your opponents defenses to steal knowledge for yourself, frequently in the form of cards to play
Teferi himself can't win a game at all so you really want other walkers to go with it
Of course, thats a Constructed-level strategy, but it was pretty easy to achieve with Wildgrowth Walker creating a loop off a single explore or lifegain trigger