Hello Gricel - welcome to basenotes!
I love magnolia, too! Although as a note it's been quite popular in the last decade or so, I don't find many perfumes that actually remind me of the magnificent ivory blossoms of the magnolia grandiflora, and I know and love that particular flower very well. I only have two favorites - Acqua di Parma Magnolia Nobile for an authentic fresh and green, slightly lemony and very creamy bloom on the branch, and my favorite stylized magnolia is L'Instant de Guerlain, a luxuriously sweet and warm honeyed magnolia accentuated by creamy vanilla, radiant amber and subtly tangy lemonade. I adore both of these and wear them frequently; I'm wearing Magnolia Nobile right now!
There are plenty of others that promise magnolia notes, but I haven't come across any that deliver the goods as well as these two. Well, there is a very nice magnolia note in Chanel Cristalle Eau Verte, but it is sooooo fleeting I can hardly recommend it for that - it's primarily a light, bright and citrussy cologne-style fragrance. I actually consider this my go-to sport-scent.
Good luck - I hope you find your glorious magnolias!