Tombstone Stairwell, and Falkenrath Noble

Prerequisites

• Tombstone Stairwell on the battlefield
• Falkenrath Noble on the battlefield

Steps

1. At the beginning of each upkeep, Tombostone Stairwell's first ability triggers, causing each player to create a 2/2 Zombie creature token for each creature card in their graveyard
2. At the beginning of each end step, Tombstone Stairwell's second ability triggers, destroying all tokens created by it
3. When the token(s) die, Falkenrath Noble triggers that many times, causing an opponent to lose that much life and you to gain that much life
4. Repeat during each turn

Results

• Near-infinite lifeloss
• Near-infinite ETB
• Near-infinite LTB
• Near-infinite death triggers
• Near-infinite lifegain
• Near-infinite lifegain triggers