Omniscience remains a fan-favourite build-around that attracts combo and ramp players whenever it is Standard legal. Casting spells from your hand for free is an incredibly powerful effect, so decks are built specifically to cheat it onto the battlefield. Reanimator, ramp, and control shells all experiment with it as a top-end payoff that overwhelms opponents. Its splashy, game-breaking nature and history in big-spell archetypes keep it popular in casual and competitive circles alike.