From what they told me, it just screamed U/B
Atraxa s four-color identity demands a stable mana base, so lists built around her often prioritize the best dual lands in MTG to keep early turns smooth and avoid color stumbles
Sideboard : Pyroclasm, Searing Blood, Smash to Smithereens, Journey to Nowhere Fancy Pants (WHITE/blue) 10 spells, 20 land Heliod's Pilgrim, Vanguard of Brimaz, Meletis Astronomer = 3 creatures Spirit Mantle, Bonds of Faith, Faith Unbroken, Shielding Plax, Ethereal Armor, Ephara's Enlightenment = 6 pants Aura Finesse = 1 fancy 12xPlains, 8xIslands Sideboard : Auramancer, Recumbent Bliss, Eel Umbra, Ordeal of Heliod
When hes played, the player may discard a card to deal 2 damage to a chosen character