Endymion, the Master Magician (Blue) (DL16-EN006) - Duelist League Promo Unlimited

You can Special Summon this card (from your hand or Graveyard) by removing 6 Spell Counters from a "Magical Citadel of Endymion" you control. When you do: Target 1 Spell Card in your Graveyard; add that target to your hand. Once per turn: You can discard 1 Spell Card, then target 1 card on the field; destroy that target.