Eyes of the Watcher

A spellslinger's library-smoothing engine that taxes you per cast rather than per turn. The optional is the whole balancing act: every instant or sorcery you fire offers a scry 2, but only if you can spare the mana to take it, which turns the enchantment into a mana-sink that competes with your actual spells for resources. That tension is the point. Stack three or four cheap cantrips in a turn and the engine reads as an endless filter, smoothing toward your wincon or digging away flooded draws; cast nothing and it sits dead on the board doing nothing at all. The design predates the wave of "draw your second spell each turn" enchantments that would later anchor blue spell-decks, and it sits earlier on that lineage: not a card-advantage engine but a card-quality one, trading raw cards for control over what you see. Scry 2 repeated across a long game is a quiet form of consistency that doesn't announce itself the way drawing extra cards does, which is exactly why it has always lived in the patient end of blue rather than the explosive end.