How can you create a combo with Orthion, Hero of Lavabrink, Dockside Extortionist, Umbral Mantle?
user
[START OF COMBO]This combo can be formed with Orthion, Hero of Lavabrink, Dockside Extortionist, Umbral Mantle

Color identity: R
Mana cost: {1}{R}
Steps:
  1. Activate Orthion's first ability by paying {1}{R} and tapping it, creating a token copy of Dockside Extortionist with haste.
  2. When the token Dockside Extortionist enters the battlefield, it triggers, creating at least five Treasure artifact tokens.
  3. Activate five Treasures by tapping and sacrificing them, adding {4}{R}.
  4. Activate Orthion by paying {3} and untapping it, giving itself +2/+2 until end of turn.
  5. Repeat.
  6. If opponents control at least six artifacts and/or enchantments, this combo nets infinite Treasure tokens and colored mana, and you may then target any other creature using Orthion's ability.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite copies of creatures you control
  - Infinite creature tokens with haste
  - Infinite enters the battlefield
  - Infinitely large Orthion until end of turn
  - Infinite Treasure tokens[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Orthion does not have summoning sickness.
  - Umbral Mantle attached to Orthion.
  - Opponents control at least five artifacts and/or enchantments.
[END OF COMBO PREREQUISITES]
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