Tenth District Hero is a rare Creature — Human card from Murders at Karlov Manor Promos (PMKM), collector number 34p. Current market price: $0.25 (foil $0.25), TCGplayer market prices via Scryfall.
{1}{W}, Collect evidence 2: This creature becomes a Human Detective with base power and toughness 4/4 and gains vigilance. {2}{W}, Collect evidence 4: If this creature is a Detective, it becomes a legendary creature named Mileva, the Stalwart, it has base power and toughness 5/5, and it gains "Other creatures you control have indestructible."