Sellen's Mentoring

If you control a legendary creature, Sellen's Mentoring costs {3} less.
Draw 5 cards.
'Young apprentice, first things first. You are a tadpole when it comes to magic. Infantile.
Without the legs to walk. So, to become a sorcerer, first, you must face your ignorance.
Now, shall we start learning?' - Sorceress Sellen, the Graven