Riordain, The Last Paladin

Defender, First Strike, Reach, Indestructible
Last Paladin (Can block creatures as though they didn't have Skulk or Unblockable
Riordain, The Last Paladin enters the battlefield tapped and doesn't untap during your untap step. Riordain, The Last Paladin unjtaps when a player attacks you, the Riordain will block that creature causing him to tap.