How can you create a combo with Magnanimous Magistrate, Opalescence, Dance of Many, Altar of Dementia?
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[START OF COMBO]This combo can be formed with Magnanimous Magistrate, Opalescence, Dance of Many, Altar of Dementia

Color identity: WU
Mana cost: {U}{U}
Steps:
  1. Cast Dance of Many by paying {U}{U}.
  2. Dance of Many enters the battlefield, creating a token copy of Magnanimous Magistrate.
  3. Activate Altar of Dementia by sacrificing Dance of Many.
  4. Dance of Many, Magnanimous Magistrate, and the token Magnanimous Magistrate trigger.
  5. Resolve the nontoken Magnanimous Magistrate trigger, declining to act.
  6. Resolve the token Magnanimous Magistrate trigger, removing two reprieve counters from it and returning Dance of Many from your graveyard to the battlefield.
  7. Dance of Many enters the battlefield, creating a token copy of Magnanimous Magistrate.
  8. Resolve the Dance of Many trigger, exiling the first Magnanimous Magistrate token.
  9. Repeat from step 3 any number of times.
  10. Resolve all Altar of Dementia abilities, milling any number of players any amount of cards.
  11. You may sacrifice and return any number of creatures with mana value 3 or less in your graveyard any number of times.[END OF COMBO STEPS]

Result:
  - Infinite blinking of creatures with mana value 3 or less on the battlefield, in graveyard, and in library
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite mill
  - Infinite sacrifice triggers
  - Infinite self-mill[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Magnanimous Magistrate must be on the battlefield
  - Opalescence must be on the battlefield
  - Dance of Many must be in your hand
  - Altar of Dementia must be on the battlefield
[END OF COMBO PREREQUISITES]
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