Ludevic, Necrogenius // Olag, Ludevic's Hubris [Innistrad: Double Feature]

As this permanent transforms into Olag, Ludevic's Hubris, it becomes a copy of one of the exiled cards, except it's name is still “Olag, Ludevic's Hubris”, it has base power and toughness 4/4, and it's a black and blue Legendary Zombie in addition to its other colors and types. Put a +1/+1 counter on it for each card exiled this way.