Based on the latest market prices tracked on TCG Stacked, Besmirch is worth about $0.49 USD for a regular copy and $1.22 USD for a foil copy
I prefer to play this card in the library of meld partner, Bruna, the Fading Light
Archelos, Lagoon Mystic Brokkos, Apex of Forever Brokkos, Apex of Forever Damia, Sage of Stone Felix Five-Boots Glarb, Calamity's Augur Gonti, Canny Acquisitor Henry Wu, InGen Geneticist Indominus Rex, Alpha Kadena, Slinking Sorcerer Kotis, Sibsig Champion Kotis, the Fangkeeper Leovold, Emissary of Trest Maralen, Fae Ascendant Mimeoplasm, Revered One Muldrotha, the Gravetide Muldrotha, the Gravetide Nashi, Moon's Legacy Nine-Fingers Keene Otrimi, the Ever-Playful Rayami, First of the Fallen Sidisi, Brood Tyrant Sin, Spira's Punishment Teval, Arbiter of Virtue Teval, the Balanced Scale The Master, Transcendent The Mimeoplasm The Wise Mothman Volrath, the Shapestealer Vorosh, the Hunter Xavier Sal, Infested Captain Yarok, the Desecrated Zaxara, the Exemplary Zimone and Dina
Acolyte isnt far off, though it does require you have your partner on board to work
