How can you create a combo with Etrata, the Silencer, Blade of Selves, Mirror Gallery, Doubling Season, Primal Vigor?
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[START OF COMBO]This combo can be formed with Etrata, the Silencer, Blade of Selves, Mirror Gallery, Doubling Season, Primal Vigor

Color identity: BGU
Mana cost: 
Steps:
  1. Declare Etrata as an attacker, attacking an opponent that owns at least two cards in exile with hit counters on them.
  2. Etrata's myriad ability triggers, creating four copies of it attacking each other opponent.
  3. Deal combat damage with each Etrata, triggering their abilities.
  4. Resolve the first Etrata ability, causing the opponent dealt damage by it to exile a creature they control with a hit counter on it, and lose the game if they have at least three cards in exile with hit counters on them.
  5. Repeat step 4  for each remaining trigger.[END OF COMBO STEPS]

Result:
  - Each opponent loses the game[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Blade of Selves attached to Etrata.
  - Etrata does not have summoning sickness.
  - An opponent owns at least two cards in exile with hit counters on them.
  - Each opponent controls at least three nontoken creatures, minus one for each card they own in exile with a hit counter on it.
[END OF COMBO PREREQUISITES]
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