Rakdos Carnarium [Commander 2011] XY48 You can only use each

You can only use each effect of "Chronicler of Nephthys" once per turn

and remove it from play

Ritual Summon any number of "Nekroz" monsters whose total Levels exactly equal the Level of that monster

unless it is a "Madolche" monster

Set: Judgment Type: Creature — Cephalid Rarity: Uncommon Cost: {2}{U} Discard a card: Cephalid Inkshrouder gains shroud until end of turn and can't be blocked this turn

Rakdos Carnarium [Commander 2011] XY48 You can only use eachSet: Commander 2011 Type: Land Rarity: Common Rakdos Carnarium enters the battlefield tapped. When Rakdos Carnarium enters the battlefield, return a land you control to its owner's hand. {T}: Add {B}{R}.