Kiora, Master of the Depths (213) [Prerelease Cards] Spellcaster/Effect They have "Sacrifice this creature:

They have "Sacrifice this creature: Add 1 to your mana pool

Rarity: R Card Type: Creature Rebel P / T: 2 / 2 Description: 3

Number: ROTD-EN062 Rarity: Secret Rare Attribute Monster Type/Card Type: SPELL /Normal Spell Description: If your opponent has activated a monster effect during your Main Phase this turn: Activate 1 of these effects

X is the number of creatures placed in the graveyard

Kiora, Master of the Depths (213) [Prerelease Cards] Spellcaster/Effect They have "Sacrifice this creature:Rarity: M #: 213 Card Type: Planeswalker Kiora Description: [+1] Untap up to one target creature and up to one target land. [ 2] Reveal the top four cards of your library. You may put a creature card and or a land card from among them into your hand. Put the rest into your graveyard. [ 8] You get an emblem with "Whenever a creature enters the battlefield under your control, you may have it fight target creature." Then put three 8 8 blue Octopus