If you control "Dark Magician": You can Special Summon this card (from your hand).
If this card is Normal or Special Summoned: You can Set 1 Spell/Trap directly from your Deck that specifically lists "Dark Magician" in its text.
You can only use this effect of "Royal Dark Magician" once per turn.
If this face-up card would be destroyed by battle or card effect, you can banish 1 Spell/Trap you control instead.