Being cheap is even more important for discard spells than it is for other types of cards because discard will never trade for any of your opponents mana
8 Kakko no Iinazuke (A Couple of Cuckoos) Kamisama Hajimemashita (Kamisama Kiss) Kanan-sama ha Akumade Choroi Kanojo, Okarishimasu (Rent a Girlfriend) Kao dake ja Suki ni Narimasen Kaoru Hana Wa Rin To Saku Karakai Jozu no Takagi-san (Teasing Master Takagi) Kieta Hatsukoi (My Love Mix-Up!) Kimetsu no Yaiba (Demon Slayer) Kimi no na wa (Your Name) Kingdom Kimitachi ha Dou Ikiruka Kochikame Koisuru Shirokuma - A Polar Bear in Love Koko wa Ima kara Rinri desu(From Now on We Begin) Komi-san wa,Komyusho desu (Komi Can't Communicate) Kono Sekai no Katasumi ni Kowloon Generic Romance Kuroshitsuji - Black Butler Kuruneko Kusuriya No Hitorigoto (The Apothecary Diaries) Legend of the Galactic Heroes - Ginga Eiyuu Denset Lycoris Recoil Made in Abyss Maho Tsukai no Yome (The Ancient Magus Bride) Maiko-san chi no Makanai-san (Kiyo in Kyoto) Mairimashita
Specifically non-creature artifacts
Concentrate is worth 4 mana, but youre also tacking on an Unexpected Results where you have some control over the outcome
Realistically, the demand surge hasnt been immense here, either, so if, or rather when, prices do drop, it shouldnt be a catastrophic fallout
