How can you create a combo with Boneyard Scourge, Miirym, Sentinel Wyrm, Phyrexian Altar?
user
[START OF COMBO]This combo can be formed with Boneyard Scourge, Miirym, Sentinel Wyrm, Phyrexian Altar

Color identity: UBRG
Mana cost: 
Steps:
  1. Activate Phyrexian Altar by sacrificing Boneyard Scourge, adding {1}.
  2. Activate Phyrexian Altar by sacrificing another Dragon, adding {B}.
  3. When the Dragon dies, Boneyard Scourge triggers, causing you to pay {1}{B} to return it from your graveyard to the battlefield.
  4. When Boneyard Scourge enters the battlefield, Miirym triggers, creating a token copy of Boneyard Scourge.
  5. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - All permanants must be on the battlefield
  - You control at least one additional Dragon.
[END OF COMBO PREREQUISITES]
assistant