Blue Sun's Zenithcard_drawBudget$4.59Very close functional match: an instant-speed X draw spell that can target any player, making it a flexible upgrade in many decks.
Stroke of Geniuscard_drawBudget$0.33Classic sorcery-speed X draw spell that targets any player, nearly identical to Braingeyser with a different mana cost structure.
Pull from Tomorrowcard_drawBudget$1.98Efficient X card draw in blue that draws X cards and discards one, often used as a scalable hand refill.
Mind Springcard_drawBudget$0.54Straightforward sorcery-speed draw-X spell that goes to your hand, serving the same late-game refill role.
Finale of Revelationcard_drawBudget$0.36Scalable blue draw spell that can draw a large number of cards and may untap lands, functioning as a stronger finisher in long games.
Sphinx's Revelationcard_drawBudget$1.10Another scalable blue draw spell that gains life as well, often stronger in control shells with white splash.
Jace's Ingenuitycard_drawBudget$0.05A budget-friendly fixed-cost instant draw spell that fills the same card-advantage role when you don't need variable X.
Concentratecard_drawBudget$0.20Sorcery-speed draw spell that simply draws three cards, a clean lower-curve alternative to scalable draw spells.