Exa, Enforcer of the Nekroz

If this card is Tributed by a card effect: You can add 1 Dragon-Type "Nekroz" Ritual Monster from your Deck to your hand. If this card is banished: You can target 1 of your banished "Nekroz" monsters, except this card; Special Summon that monster. You can only use 1 "Exa, Enforcer of the Nekroz" effect per turn, and only once that turn.