Hollowhenge Overlord + Primal Vigor + Mondrak, Glory Dominus

Hollowhenge Overlord

Primal Vigor

Mondrak, Glory Dominus

How it works

1. At the beginning of your upkeep, Hollowhenge Overlord triggers, creating four 2/2 Wolf creature tokens for each Wolf and/or Werewolf you control due to Primal Vigor and Mondrak.
2. Repeat step 1 during each of your upkeeps. You'll create exponentially more Wolves each time assuming the Wolf tokens survive.