How can you create a combo with Undead Sprinter, Birgi, God of Storytelling // Harnfel, Horn of Bounty, Phyrexian Altar?
user
[START OF COMBO]This combo can be formed with Undead Sprinter, Birgi, God of Storytelling // Harnfel, Horn of Bounty, Phyrexian Altar

Color identity: BR
Mana cost: {B/R}
Steps:
  1. Activate Phyrexian Altar by sacrificing Undead Sprinter, adding {B/R}.
  2. Cast Undead Sprinter from your graveyard by paying {B}{R}.
  3. Birgi triggers, adding {R}.
  4. Activate Phyrexian Altar by sacrificing Undead Sprinter, adding {B}.
  5. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite leaves the battlefield
  - Infinite enters the battlefield
  - Infinite sacrifice triggers
  - Infinite death triggers
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - A non-Zombie creature has died this turn.
[END OF COMBO PREREQUISITES]
assistant