Once the countdown begins, you don't even need to attacksimply drop Atraxa and cast spells like Experimental Augury or Tezzeret's Gambit to draw cards and proliferate

Alela, Artful Provocateur Aminatou, Veil Piercer Aminatou, the Fateshifter Arna Kennerd, Skycaptain Arsenal Thresher Bane, Lord of Darkness Birth of the Imperium Brilliant Ultimatum Chromium Chromium, the Mutable Dakkon Blackblade Dakkon, Shadow Slayer Deny the Witch Diviner of Fates Dromar's Charm Dromar, the Banisher Elenda and Azor Enigma Sphinx Eriette, the Beguiler Ertai, the Corrupted Esper Charm Esper Sojourners Esper Stormblade Etherwrought Page G'raha Tia, Scion Reborn Halfdane Inquisitor Greyfax Kamiz, Obscura Oculus Lady Evangela Magister Sphinx Marneus Calgar Merieke Ri Berit Narod, the Beige Flower (playtest) Nevinyrral, Urborg Tyrant Nihiloor Nimble Larcenist Noctis, Heir Apparent Noctis, Prince of Lucis Obscura Ascendancy Obscura Charm Obscura Confluence Obscura Interceptor Oloro, Ageless Ascetic Punish Ignorance Queza, Augur of Agonies Raffine, Scheming Seer Ratonhnhak:ton Saruman of Many Colors Sefris of the Hidden Ways Sen Triplets Sharuum the Hegemon Shattered Seraph Sidar Jabari of Zhalfir Sludge Strider Soundwave, Sonic Spy Soundwave, Superior Captain Sphinx Sovereign Sphinx of the Steel Wind Sydri, Galvanic Genius Temmet, Naktamun's Will The Destined Warrior The Ever-Changing 'Dane The Flesh Is Weak The Master of Keys Thopter Foundry Tivit, Seller of Secrets Toluz, Clever Conductor Tower Gargoyle Urza, Chief Artificer Varina, Lich Queen Void Rend Wandering Mage

Its impossible to block with small creatures, and when it dies, you get to dome an opponent for six damage
It stabilizes first, then starts squeezing the table
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On the first occasion, Fiery Temper was awesome, and really helped push Madness to the top of the Standard Heap o' Decks