Silver Sentinel (REDU-EN033)

You can Set this card from your hand to your Spell & Trap Card Zone as a Spell Card. During the End Phase of the turn this Set card in your Spell & Trap Card Zone was destroyed by an opponent's card effect and sent to the Graveyard: Target 1 card your opponent controls (if possible); Special Summon this card from the Graveyard, and if you do, destroy that target (if any).

Warrior / Effect, Return of the Duelist