Freddy, Lord of Nightmares

Flash

When Freddy enters, exile all dream cards then return them to the battlefield transformed under your control.

Kill Count — Whenever a creature an opponent controls dies, put a Kill counter on Freddy.

At the beginning of your upkeep, you may search your library for a nightmare card with mana value less than or equal to the amount of kill counters on Freddy, reveal it, put it into your hand, then shuffle.