How can you create a combo with Sakashima the Impostor, Opalescence, Detention Sphere?
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[START OF COMBO]This combo can be formed with Sakashima the Impostor, Opalescence, Detention Sphere

Color identity: WU
Mana cost: {2}{U}{U}
Steps:
  1. Cast Sakashima the Impostor by paying {2}{U}{U}, having it enter the battlefield as a copy of Detention Sphere that is a 3/3 legendary enchantment creature named Sakishima the Imposter.
  2. When Sakashima the Impostor, it triggers its first ability from Detention Sphere, exiling itself.
  3. Sakashima the Impostor leaves the battlefield, triggering its second ability from Detention Sphere, returning itself to the battlefield as a copy of Detention Sphere that is a 3/3 legendary creature named Sakashima the Impostor.
  4. Repeat from step 2 any number of times.
  5. End the loop by choosing a different creature to copy or a different permanent to exile, or by declining to exile anything.[END OF COMBO STEPS]

Result:
  - Infinite enters the battlefield
  - Infinite leaves the battlefield[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Sakashima the Impostor must be in your hand
  - Opalescence must be on the battlefield
  - Detention Sphere must be on the battlefield
[END OF COMBO PREREQUISITES]
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