How can you create a combo with Feldon of the Third Path, Dockside Extortionist, Intruder Alarm?
user
[START OF COMBO]This combo can be formed with Feldon of the Third Path, Dockside Extortionist, Intruder Alarm

Color identity: UR
Mana cost: {2}{R}
Steps:
  1. Activate Feldon by paying {2}{R} and tapping it, creating a token copy of Dockside Extortionist with haste that is an artifact in addition to its other types.
  2. When Dockside Extortionist enters the battlefield, it and Intruder Alarm trigger.
  3. Resolve the Intruder Alarm trigger, untapping all creatures.
  4. Resolve the Dockside Extortionist trigger, creating at least four Treasure tokens.
  5. Activate three Treasures by tapping and sacrificing them, adding {2}{R}.
  6. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite creature tokens with haste
  - Infinite enters the battlefield
  - Infinite mana creatures you control can produce
  - Infinite Treasure tokens
  - Infinite untap of all creatures[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Feldon of the Third Path must be on the battlefield
  - Dockside Extortionist must be in the graveyard
  - Intruder Alarm must be on the battlefield
  - Feldon does not have summoning sickness.
  - Opponents control at least four artifacts and/or enchantments.
[END OF COMBO PREREQUISITES]
assistant