9 cards where the card is tagged “roman-numeral”

Emperor Apatzec Intli IV (Alchemy: Outlaws of Thunder Junction #21)
Emperor Mihail II (The Lost Caverns of Ixalan Commander #155)
Grand Arbiter Augustin IV (Double Masters 2022 #221)
Infernius Spawnington III, Esq. (Unsanctioned #40)
K-9, Mark I (Doctor Who #47)
King Darien XLVIII (Dominaria United #204)
Parhelion II (Neon Dynasty Commander #87)
Romana II (Doctor Who #27)
Sarpadian Empires, Vol. VII (Time Spiral #263)

Though this query has ended, its relics still slumber in New Argive.