Sakashima the Impostor + Opalescence + Detention Sphere

Sakashima the Impostor
Opalescence
Detention Sphere

Requires
Sakashima the Impostor must be in hand. Opalescence must be on the battlefield. Detention Sphere must be on the battlefield. Mana needed: 2
Steps
  1. Cast Sakashima the Impostor by paying 2, 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.
Results
Infinite ETB. Infinite LTB.

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36% of 61 decks +35% synergy
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Sea Gate Restoration
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Political Trickery
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54% of 63 decks +54% synergy
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46% of 61 decks +29% synergy
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37% of 51 decks +20% synergy
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36% of 55 decks +20% synergy
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36% of 61 decks +6% synergy
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30% of 63 decks +5% synergy
Hallowed Fountain
27% of 63 decks -14% synergy
Training Center
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25% of 63 decks +13% synergy
Spectator Seating
25% of 57 decks -1% synergy
Sea of Clouds
24% of 63 decks -2% synergy
Clifftop Retreat
23% of 61 decks -5% synergy
Steam Vents
23% of 61 decks -16% synergy
Sacred Foundry
21% of 61 decks -15% synergy
Gemstone Caverns
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Shivan Reef
16% of 61 decks -10% synergy
Plateau
13% of 61 decks +1% synergy
Volcanic Island
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Battlefield Forge
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Arid Mesa
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Prairie Stream
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Scalding Tarn
10% of 63 decks -1% synergy
Adarkar Wastes
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Wind-Scarred Crag
7% of 61 decks +0% synergy
Nimbus Maze
6% of 63 decks +1% synergy
Reflecting Pool
6% of 63 decks +1% synergy
Mana Confluence
6% of 63 decks -1% synergy
Riverglide Pathway
5% of 57 decks -4% synergy