Are the cards viable for competitive play
Elspeth, Storm Slayer Ugin, Eye of the Storms Voice of Victory Ugin, Eye of the Storms (Borderless) Elspeth, Storm Slayer (Borderless) Ugin, Eye of the Storms (Showcase) Voice of Victory (Borderless) Elspeth, Storm Slayer (Showcase) Mox Jasper (Showcase) Mox Jasper Aetherdrift Magics power-sliding set is still proving pretty popular, with the top 10 cards according to TCGPlayer data including lands, sorceries, and that all-important Aetherspark
The deck could stall specifically the key Lake of the Dead-driven life gain, suppress life total short term, hold off the "pump" Orders with Suq'Ata Firewalker, and eventually finish with a lone Fireball
Where this deck can go against you is the inclusion of a lot of high-cost, uninkable cards that can sit in your hand for ages and slow you down