How can you create a combo with Orcish Bowmasters, Agatha's Soul Cauldron, Whirlpool Warrior, Ashnod's Altar?
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[START OF COMBO]This combo can be formed with Orcish Bowmasters, Agatha's Soul Cauldron, Whirlpool Warrior, Ashnod's Altar

Color identity: UBR
Mana cost: {2}{B}
Steps:
  1. Cast Orcish Bowmasters by paying {1}{B}.
  2. When Orcish Bowmasters enters the battlefield, it triggers, creating a 0/0 Orc Army token if you do not control an Army, then putting a +1/+1 counter on an Army you control and dealing 1 damage to any target.
  3. Activate the Orc Army using Whirlpool Warrior's ability by paying {1} and sacrificing it, causing each player to shuffle their hand into their library, and causing each player to draw that many cards.
  4. Orcish Bowmasters triggers for each card opponents draw this way.
  5. Resolve the first trigger, creating a 0/0 Orc Army token, then putting a +1/+1 counter on it and dealing 1 damage to any target.
  6. Activate Ashnod's Altar by sacrificing the Orc Army, adding {C}{C}.
  7. Resolve the second Orcish Bowmaster trigger, creating a 0/0 Orc Army token, then putting a +1/+1 counter on it and dealing 1 damage to any target.
  8. Holding priority, repeat from step 3 an arbitrarily large number of times.
  9. Resolve the first remaining Orcish Bowmasters trigger, if applicable, creating a 0/0 Orc Army token if you do not control one, then putting a +1/+1 counter on an Army you control and dealing 1 damage to any target.
  10. Repeat from step 9 for each remaining trigger.[END OF COMBO STEPS]

Result:
  - Infinite +1/+1 counters on an Army token
  - Infinite colorless mana
  - Infinite damage
  - Infinite death triggers
  - Infinite draw triggers for all players
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Orcish Bowmasters must be in your hand
  - Agatha's Soul Cauldron must be on the battlefield
  - Whirlpool Warrior must be exiled
  - Ashnod's Altar must be on the battlefield
  - Opponents have at least two cards in hand.
[END OF COMBO PREREQUISITES]
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