Know Evil is a common Scheme card from Archenemy: Nicol Bolas Schemes (OE01), collector number 8★. Current market price: $3.61, TCGplayer market prices via Scryfall.
When you set this scheme in motion, until your next turn, up to one target opponent can't attack with creatures, up to one target opponent can't cast creature spells, and up to one target opponent can't cast noncreature spells. You can't choose any player as a target more than once.