How can you create a combo with Saffi Eriksdotter, Crypt Champion?
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[START OF COMBO]This combo can be formed with Saffi Eriksdotter, Crypt Champion

Color identity: BRGW
Mana cost: {3}{B} in non-red mana
Steps:
  1. Cast Crypt Champion by paying {3}{B}, ensuring not to spend {R} to cast it.
  2. Crypt Champion enters the battlefield, triggering its first and second abilities.
  3. Holding priority, activate Saffi by sacrificing it, targeting Crypt Champion.
  4. Resolve the first Crypt Champion trigger, returning Saffi from your graveyard to the battlefield.
  5. Resolve the second Crypt Champion trigger, sacrificing it.
  6. Saffi triggers, returning Crypt Champion from your graveyard to the battlefield.
  7. Repeat from step 2.[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:
  - Saffi Eriksdotter must be on the battlefield
  - Crypt Champion must be in your hand
[END OF COMBO PREREQUISITES]
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