Blue Sun's Zenithcard_draw$4.59A direct X-draw spell in blue that scales with available mana and can draw a large number of cards at instant speed. It fills the same late-game card advantage role.
Stroke of Geniuscard_draw$0.33Very similar to Mind Spring as an X spell that draws X cards in blue. It is one of the closest functional equivalents for raw card draw.
Pull from Tomorrowcard_draw$1.98An X draw spell in mono-blue that draws X cards and then discards a card, serving the same mana-sink card advantage role. The discard is a small drawback, but it often costs less for comparable output.
Secure the Wastesutility$3.06While not card draw, it is a classic blue deck mana sink at instant speed that converts excess mana into a large resource swing. It is a common alternate scalable finisher/value spell in control shells.
Fact or Fictioncard_draw$1.75A strong blue card-advantage spell that provides multiple cards for midgame resource refilling. It is not X-based, but it serves a similar role as a large burst of cards.
Opportunitycard_drawBudget$0.03Instant-speed blue draw spell that gives a big card burst, especially in control decks. It plays a similar role as a late-game refill spell.
Overflowing Insightcard_draw$0.41A high-end blue sorcery that draws a massive number of cards, acting as a haymaker refill spell. It is more expensive, but it occupies the same 'refuel your hand' slot.
Fathom Trawlcard_draw$0.31This sorcery is a blue card-advantage spell that can put multiple cards into your hand, functioning as a value refill. It is less flexible than Mind Spring but fills a similar draw-centric role.