Liliana, loyal to walls

+2: Exile target wall from your graveyard. Create a 3/x zombie wall, where its toughness is equal to the exiled walls toughness.
-5: Search your library for 3 walls, put them in your graveyard, and create an 5/x wall token with toughness of the walls put in graveyards this way.
-9: Put all walls from all graveyards onto the battlefield under your conrol.