How can you create a combo with Fain, the Broker, Ashnod's Altar, Haunted One, Relic of Legends?
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[START OF COMBO]This combo can be formed with Fain, the Broker, Ashnod's Altar, Haunted One, Relic of Legends

Color identity: B
Mana cost: 
Steps:
  1. Activate Relic of Legends by tapping your commander, adding {B}.
  2. Your commander triggers, giving it +2/+0 and undying until end of turn.
  3. Activate Ashnod's Altar by sacrificing your commander, adding {C}{C}.
  4. When your commander dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  5. Activate Fain's second ability by tapping it and removing the +1/+1 counter from your commander, creating a Treasure artifact token.
  6. Activate the Treasure by tapping and sacrificing it, adding {1}.
  7. Activate Fain's fourth ability by paying {3}{B}, untapping it.
  8. 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
  - Fain is not your commander.
  - Fain does not have summoning sickness.
  - Your commander is on the battlefield and does not have a +1/+1 counter on it.
[END OF COMBO PREREQUISITES]
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