Sisay's Ingenuity

The cantrip is the whole reason this Aura was ever printed. For a single blue, you draw a card, which means the enchantment replaces itself the moment it lands: even if the granted ability never fires, you have spent one mana to cycle through your deck and stuck a permanent on a body. That enters-the-battlefield draw trigger is what separates this kind of color-changing Aura from the dead weight Auras usually carry, where a single removal spell costs you the spell and the creature both. The ability it grants is pure utility from a bygone design philosophy: changing a creature's color was a real lever in an era when protection from a color and color-restricted removal cared deeply about what color your blocker was. You could turn an attacker the wrong color to slip past a protection ability, or recolor your own creature out from under a Terror or a Doom Blade that only reads certain colors, all at instant speed. The function reads as obscure now because the metagame stopped pricing color in, but the chassis (a one-mana enchantment that draws a card and parks a repeatable activated ability on a permanent) is the kind of low-opportunity-cost design that holds up regardless of whether anyone ever pays the to use it.