How can you create a combo with Doomgape, Serra Avatar, Enduring Tenacity?
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[START OF COMBO]This combo can be formed with Doomgape, Serra Avatar, Enduring Tenacity

Color identity: WBG
Mana cost: 
Steps:
  1. At the beginning of your upkeep, Doomgape triggers, causing you to sacrifice Serra Avatar and gain life equal to its toughness.
  2. Enduring Tenacity triggers, causing an opponent to lose life equal to the life you gained.[END OF COMBO STEPS]

Result:
  - Near-infinite lifegain
  - Near-infinite lifeloss for target opponent[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
[END OF COMBO PREREQUISITES]
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