How can you create a combo with Corpse Dance, Lord of the Forsaken, Spectral Arcanist, Skirge Familiar, Dross Harvester?
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[START OF COMBO]This combo can be formed with Corpse Dance, Lord of the Forsaken, Spectral Arcanist, Skirge Familiar, Dross Harvester

Color identity: UB
Mana cost: {3}{U}
Steps:
  1. Cast Spectral Arcanist by paying {3}{U}.
  2. When Spectral Arcanist enters the battlefield, it triggers.
  3. Holding priority, activate Skirge Familiar by discarding Corpse Dance, adding {B}.
  4. Activate Lord of the Forsaken's first ability by paying {B} and sacrificing Spectral Arcanist.
  5. When Spectal Arcanist dies, Dross Harvester's second ability triggers, causing you to gain 2 life.
  6. Resolve the Lord of the Forsaken ability, causing target player to mill three cards.
  7. Activate Lord of the Forsaken's second ability twice by paying 2 life, adding {C}{C} that can only be spent to cast a spell from your graveyard.
  8. Resolve the Spectral Arcanist trigger from step 2, causing you to pay {2} to cast Corpse Dance from your graveyard with buyback.
  9. Resolve Corpse Dance, returning Spectral Arcanist from your graveyard to the battlefield, and returning Corpse Dance to your hand.
  10. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite lifegain triggers
  - Infinite leaves the battlefield
  - Infinite magecraft triggers
  - Infinite mill
  - Infinite sacrifice triggers
  - Infinite self-discard triggers
  - Infinite self-mill
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Corpse Dance must be in your hand
  - Lord of the Forsaken must be on the battlefield
  - Spectral Arcanist must be in your hand
  - Skirge Familiar must be on the battlefield
  - Dross Harvester must be on the battlefield
[END OF COMBO PREREQUISITES]
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