You may cast sorcery spells as though they had flash.
Whenever the Ring tempts you, if you chose a creature other than Gandalf as your Ring-bearer, draw a card.
Hold up mana and react: Gandalf lets you cast everything—including sorceries—at instant speed, so you play a flash-control game, deploying threats and answers on opponents' turns while drawing extra cards each time the Ring tempts you (just keep a cheap token or different creature as Ring-bearer). You win by leveraging flash flexibility, card advantage, and big interactive blue payoffs.
Flash on sorceries lets you bluff open mana and respond with the perfect spell, dodging sorcery-speed timing weaknesses
Built-in card advantage engine from the Ring tempting you as long as a non-Gandalf creature is Ring-bearer
Mono-blue consistency: easy mana base, strong access to counters, card draw, and tutors
Flash itself protects Gandalf and enables surprise blockers, ambush threats, and end-of-turn plays
Mono-blue lacks efficient removal for resolved permanents and has no real recursion
Card advantage doesn't directly close games—needs dedicated win conditions
Removal-heavy or fast combo tables can punish a reactive, durdly shell
Ring temptation only draws if you keep another creature as Ring-bearer, requiring board presence