If this card is Normal or Special Summoned from the hand: You can target 1 card on the field; destroy it. Cannot be destroyed by battle with a DARK monster, or by a DARK monster's effects. Once per turn, at the start of the Damage Step, if this card attacks an opponent's monster: You can banish that opponent's monster until the End Phase, also this card can make a second attack in a row.
Yeah, and you can't Summon Dark Magician with Starry Knight Astel, Arrival, Ceremony or Balefire. ;p There's more than enough ways to Summon it. In a way, they're kind of right, in that Starry Knights kinda play similarly to DM, constantly Summoning their 2500 boss and getting a once-per-turn removal due to it, but I wouldn't say DM is outright better, though it does have a bit more support.