Kessig Wolf Run. Since you don't have to spend mana to play creatures once you have a Lurking Predators in play, this deck loves Kessig Wolf Run. It allows any creature to swing for lethal damage by the midgame.

A creature like Ursapine also wouldn't be out of place. This can also mess up the combat math for other players - when opponents attack each other, you can pump attacking/defending creatures so everything involved in

Primeval titan actually handles creature theft vie Homeward Path. Primeval titan can also fetch High Market to sac your creatures in response to eradicate.

Primal Surge. Since every other card in the deck is a permanent, adding one of these in could drop your entire deck into play.