Sanity Grinding is a rare Sorcery card from Eventide (EVE), collector number 29. Current market price: $1.42 (foil $17.97), TCGplayer market prices via Scryfall.
Chroma — Reveal the top ten cards of your library. For each blue mana symbol in the mana costs of the revealed cards, target opponent mills a card. Then put the cards you revealed this way on the bottom of your library in any order.