47 cards where the set is “uma” and the cards were printed at a new rarity

Arena Athlete (Ultimate Masters #123)
Canker Abomination (Ultimate Masters #212)
Dimir Guildmage (Ultimate Masters #213)
Fire // Ice (Ultimate Masters #225)
Foil (Ultimate Masters #55)
Groundskeeper (Ultimate Masters #168)
Lotus-Eye Mystics (Ultimate Masters #23)
Mammoth Umbra (Ultimate Masters #24)
Miming Slime (Ultimate Masters #173)
Moan of the Unhallowed (Ultimate Masters #107)
Molten Birth (Ultimate Masters #140)
Offalsnout (Ultimate Masters #108)
Reckless Wurm (Ultimate Masters #144)
Resurrection (Ultimate Masters #30)
Skyspear Cavalry (Ultimate Masters #36)
Slum Reaper (Ultimate Masters #114)
Sparkspitter (Ultimate Masters #149)
Tethmos High Priest (Ultimate Masters #40)
Vessel of Endless Rest (Ultimate Masters #235)
Wandering Champion (Ultimate Masters #42)
Angel of Despair (Ultimate Masters #196)
Apprentice Necromancer (Ultimate Masters #84)
Dawn Charm (Ultimate Masters #13)
Devoted Druid (Ultimate Masters #162)
Dreamscape Artist (Ultimate Masters #52)
Firewing Phoenix (Ultimate Masters #130)
Forbidden Alchemy (Ultimate Masters #56)
Hero of Iroas (Ultimate Masters #20)
Hero of Leina Tower (Ultimate Masters #169)
Laboratory Maniac (Ultimate Masters #61)
Lava Spike (Ultimate Masters #136)
Living Lore (Ultimate Masters #62)
Magmaw (Ultimate Masters #138)
Shirei, Shizo's Caretaker (Ultimate Masters #112)
Sigil of the New Dawn (Ultimate Masters #35)
Sleight of Hand (Ultimate Masters #70)
Slippery Bogle (Ultimate Masters #223)
Snake Umbra (Ultimate Masters #182)
Songs of the Damned (Ultimate Masters #115)
Travel Preparations (Ultimate Masters #188)
Unstable Mutation (Ultimate Masters #80)
Wild Hunger (Ultimate Masters #193)
Reanimate (Ultimate Masters #110)
Sublime Archangel (Ultimate Masters #38)
Dark Depths (Ultimate Masters #241)
Mana Vault (Ultimate Masters #229)
Temporal Manipulation (Ultimate Masters #77)

Their mind whirled with grand plans, never thinking of what might happen if they got to the end of the list.