Prerequisites
- Hollowhenge Overlord on the battlefield
- Anointed Procession on the battlefield
- Elspeth, Storm Slayer on the battlefield
Steps
- 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 Anointed Procession and Elspeth, Storm Slayer
- Repeat step 1 during each of your upkeeps
- You'll create exponentially more Wolves each time assuming the Wolf tokens survive
Results
Required Cards 3

Hollowhenge Overlord
Creature — Wolf

Anointed Procession
Enchantment

Elspeth, Storm Slayer
Legendary Planeswalker — Elspeth