Yahenni, Undying Partisan + Agatha's Soul Cauldron + Triskelion

Yahenni, Undying Partisan
Agatha's Soul Cauldron
Triskelion
Requires
Yahenni, Undying Partisan must be on the battlefield. Agatha's Soul Cauldron must be on the battlefield. Triskelion must be in exile (exiled by Agatha's Soul Cauldron).
Steps
  1. Give Yahenni deathtouch, if needed.
  2. Activate Yahenni using Triskelion's ability by removing a +1/+1 counter from it, dealing 1 damage to a creature an opponent controls, and destroying it due to Yahenni's deathtouch.
  3. Yahenni triggers, putting a +1/+1 counter on it.
  4. Repeat from step 2.
  5. If you can give Yahenni deathtouch indefinitely, you may repeat this loop whenever a creature enters the battlefield under an opponent's control.
Results
Destroy all creatures opponents control. Destroy any creature that enters the battlefield under an opponent's control.
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0.15% of 10361 decks 16 decks
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1.03% of 292 decks 3 decks
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29% of 14 decks +24% synergy
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61% of 18 decks +40% synergy
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53% of 17 decks +25% synergy
Undergrowth Stadium
50% of 14 decks +24% synergy
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45% of 33 decks +34% synergy
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Vault of Champions
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43% of 14 decks +17% synergy
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36% of 11 decks +24% synergy
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36% of 14 decks +6% synergy
Marsh Flats
33% of 33 decks +22% synergy
Mana Confluence
30% of 33 decks +23% synergy
Bloodstained Mire
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Smoldering Marsh
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Opal Palace
24% of 33 decks +22% synergy
Scalding Tarn
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Stormcarved Coast
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22% of 18 decks +9% synergy
Shipwreck Marsh
22% of 23 decks +3% synergy
Golgari Rot Farm
21% of 14 decks +4% synergy
Reflecting Pool
21% of 33 decks +16% synergy
City of Brass
21% of 33 decks +13% synergy
Fabled Passage
21% of 33 decks +12% synergy
Undercity Sewers
20% of 15 decks +9% synergy
Windswept Heath
18% of 33 decks +8% synergy
Riverglide Pathway
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18% of 17 decks +4% synergy
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17% of 18 decks +0% synergy
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