Exclusion Ritual

Oracle Text

Imprint — When Exclusion Ritual enters the battlefield, exile target nonland permanent.

Players can't cast spells with the same name as the exiled card.

Card Rulings

6/1/2011 If the exiled card somehow leaves exile, the last ability will no longer have any effect.
6/1/2011 In a Commander game, a player may replace Exclusion Ritual exiling their commander with putting that commander into the command zone. If this happens, Exclusion Ritual’s last ability will have no effect.