Emrakul's Hatcher [Rise of the Eldrazi] Nightmare Merfolk Crovax sensed that Mirri wasn't

Crovax sensed that Mirri wasn't ready for the curse taking hold of her

Enchanted library is an artifact creature on the battlefield with power and toughness each equal to the number of cards in it

Its controller draws two cards

Set: Mirrodin Besieged Type: Instant Rarity: Common Cost: {R} Destroy target noncreature artifact

Scraps are enough

Emrakul's Hatcher [Rise of the Eldrazi] Nightmare Merfolk Crovax sensed that Mirri wasn'tSet: Rise of the Eldrazi Type: Creature Eldrazi Drone Rarity: Common Cost: {4}{R} When Emrakul's Hatcher enters the battlefield, create three 0 1 colorless Eldrazi Spawn creature tokens. They have "Sacrifice this creature: Add {C}." Wordlessly it leads its abhorrent brood.