Rain of Gore [Dissension] Hour of Devastation Prerelease Promos Cognivore's power and toughness are

Cognivore's power and toughness are each equal to the number of instant cards in all graveyards

except it has haste and "At the beginning of the end step

you gain 1 life for each spell you've cast this turn

We are ready

Set: Kaladesh Type: Artifact Creature — Construct Rarity: Rare Cost: {5} When Multiform Wonder enters the battlefield

Rain of Gore [Dissension] Hour of Devastation Prerelease Promos Cognivore's power and toughness areSet: Dissension Type: Enchantment Rarity: Rare Cost: {B}{R} If a spell or ability would cause its controller to gain life, that player loses that much life instead. "Stay indoors, away from what seeps over the thresholds. This is the Demon's work, and only ill can come of it." Belko, owner of Titan's Keg tavern