'Unfinity' looks like it will be a wild set, so it might be difficult to evaluate, but if I manage to write it up, please read that article as well.
Legendary Planeswalker - Teferi Protection (CTRL to add secondary) Ramp Kinnan, Bonder Prodigy Whenever you tap a nonland permanent for mana, add one mana of any type that permanent produced
Despite this simplicity, however, the card is very effective
$0.49 Spikeshot Elder Scars of Mirrodin $0.35 Incite 2011 Core Set $0.35 Flailing Soldier Mercadian Masques $0.35 Frantic Scapegoat Murders at Karlov Manor $0.35 Karplusan Wolverine Coldsnap $1.29 Sticky Fingers Streets of New Capenna $0.35 Irreverent Gremlin Duskmourn: House of Horror $0.35 Harried Spearguard Wilds of Eldraine $0.69 Burnout Bashtronaut Aetherdrift $0.35 Bonesplitter Mirrodin $0.35 Laccolith Whelp Nemesis $0.49 Kessig Wolfrider Innistrad: Crimson Vow 0 results found
For just three mana what do you get
This said, the Fractal Doubling Season can be blocked and they do die to removal, so if just making two 48/48's with a single Applied Geometry isn't enough to win the game, things can get even crazier
