Not even the obscene amount of fusions can make Dark Magician good, and thats even with a couple of really good ones such as The Dark Magicians and Dark Magician The Dragon Knight
Where its at its best is on turn one helping you cast a ton of mana rocks, your Tymna, or a Rhystic Study, or slightly later, maybe on turn three, where it helps you double or triple spell some of your most impactful (but more expensive) cards
Excluding the "Hieratic Seal" Main Deck monsters, the "Hieratic" Xyz monsters, and "Hieratic Dragon" of "Sutekh", "Asar", and "Nuit", all "Hieratic" monsters trigger a mandatory Trigger Effect when they are tributed (regardless if from the hand or field), to Special Summon 1 Dragon monster from the player's hand, Deck, or Graveyard, who will have 0 ATK/DEF
Card Name Mana Cost Type Legendary Creature Human Noble Knight Rarity Rare rules Text Dragonfire Dive - During your turn, Dion and other Knights you control have flying.When Dion enters, create a 2/2 white Knight creature token., : Exile Dion, then return it to the battlefield transformed under its owner's control