Riordain of the Ill Order

Defender, First Strike, Reach, Indestructible
Prince (Riordain of the Ill Order can be your commander, but gains shroud when Blocking)
Riordain enters the battlefield tapped and doesn't untap during your untap step. Riordain, The Last Paladin untaps when a player attacks you, the Riordain will block that creature causing him to tap.