It functions as a win condition on its own, generating mana advantage and card advantage each time it deals damage to your opponent
That said, the Supreme Mattes are definitely middle of the pack in terms of feel

Release date: 2025-06-13 Adeline, Resplendent Cathar Ranger-Captain of Eos Sram, Senior Edificer Counterspell Urza, Lord High Artificer Venser, Shaper Savant Bolas's Citadel Dark Ritual Fatal Push Syr Konrad, the Grim Yawgmoth, Thran Physician Ancient Copper Dragon Godo, Bandit Warlord Purphoros, God of the Forge Azusa, Lost but Seeking Nyxbloom Ancient Jodah, the Unifier Tymna the Weaver Winota, Joiner of Forces Traxos, Scourge of Kroog Akroma's Will Danitha Capashen, Paragon Kenrith, the Returned King Loran of the Third Path Mangara, the Diplomat Stroke of Midnight Wall of Omens Brainstorm Cryptic Command Laboratory Maniac Rhystic Study Teferi, Mage of Zhalfir Deadly Dispute Diabolic Intent Gix, Yawgmoth Praetor K'rrik, Son of Yawgmoth Varragoth, Bloodsky Sire Captain Lannery Storm Light Up the Stage Lightning Bolt Mizzix's Mastery Najeela, the Blade-Blossom Ragavan, Nimble Pilferer Carpet of Flowers Farseek Fynn, the Fangbearer Nature's Claim Primeval Titan Atraxa, Grand Unifier Bruse Tarl, Boorish Herder Dovin's Veto Inalla, Archmage Ritualist Ishai, Ojutai Dragonspeaker Isshin, Two Heavens as One Kinnan, Bonder Prodigy Kraum, Ludevic's Opus Muldrotha, the Gravetide Thrasios, Triton Hero Vial Smasher the Fierce Yuriko, the Tiger's Shadow Chromatic Lantern Smuggler's Copter Strixhaven Stadium Command Beacon

But I think there are better ones that do the same job, like Riku of Two Reflections
Maui comes with three very strong abilities that can help you close out a game very quickly