Nykthos, Shrine to Nyx [The List] Murichim They have "Sacrifice this creature:

They have "Sacrifice this creature: Add {C}

When this card is Special Summoned: You can target 1 face-up Attack Position monster your opponent controls

Set: Aether Revolt Prerelease Promos Type: Sorcery Rarity: Rare Cost: {4}{G}{G} Draw cards equal to the greatest power among creatures you control

it gains 100 ATK and loses 100 DEF

then target 1 Defense Position monster on the field

Nykthos, Shrine to Nyx [The List] Murichim They have "Sacrifice this creature:Set: The List Type: Legendary Land Rarity: Rare {T}: Add {C}. {2}, {T}: Choose a color. Add an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)