Spark Double + Murderous Redcap + Ashnod's Altar

Spark Double
Murderous Redcap
Ashnod's Altar

Requires
Spark Double must be on the battlefield (as a copy of Murderous Redcap). Murderous Redcap must be on the battlefield. Ashnod's Altar must be on the battlefield.
Steps
  1. Activate Ashnod's Altar by sacrificing Spark Double, adding .
  2. When Spark Double dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
  3. As Spark Double enters the battlefield, choose to have it enter the battlefield as a copy of Murderous Redcap with a +1/+1 counter on it.
  4. When Spark Double enters the battlefield, it triggers, dealing damage equal to its power to any target.
  5. Repeat.
Results
Infinite colorless mana. Infinite damage. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers.

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2.16% of 10123 decks 219 decks
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8% of 235 decks +2% synergy
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Watery Grave
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65% of 235 decks +27% synergy
Exotic Orchard
63% of 235 decks +28% synergy
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57% of 235 decks +30% synergy
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54% of 235 decks +34% synergy
Underground River
54% of 235 decks +33% synergy
Morphic Pool
53% of 235 decks +27% synergy
Bloodstained Mire
51% of 235 decks +41% synergy
Luxury Suite
51% of 235 decks +25% synergy
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50% of 6 decks +18% synergy
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50% of 6 decks +14% synergy
Temple Garden
50% of 6 decks +10% synergy
Hallowed Fountain
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Breeding Pool
50% of 6 decks +10% synergy
Polluted Delta
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Scalding Tarn
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Training Center
47% of 235 decks +20% synergy
Dragonskull Summit
47% of 235 decks +15% synergy
Drowned Catacomb
46% of 235 decks +19% synergy
Crumbling Necropolis
45% of 235 decks +14% synergy
Sulfur Falls
40% of 235 decks +9% synergy
City of Brass
35% of 235 decks +27% synergy
Opal Palace
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Guildmages' Forum
31% of 235 decks +31% synergy
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31% of 235 decks +12% synergy
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29% of 235 decks -4% synergy
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26% of 235 decks +19% synergy
Haunted Ridge
24% of 235 decks +8% synergy
Stormcarved Coast
23% of 235 decks +6% synergy
Blightstep Pathway
17% of 235 decks +8% synergy
Path of Ancestry
17% of 235 decks -4% synergy
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17% of 235 decks +7% synergy
Evolving Wilds
16% of 235 decks -5% synergy
Reflecting Pool
15% of 235 decks +10% synergy
Seething Landscape
13% of 136 decks +4% synergy
Riverglide Pathway
13% of 235 decks +5% synergy
Fabled Passage
13% of 235 decks +4% synergy
Temple of Deceit
13% of 235 decks -4% synergy
Graven Cairns
12% of 235 decks +4% synergy
Terramorphic Expanse
12% of 235 decks -3% synergy
Badlands
11% of 235 decks -2% synergy
Maestros Theater
11% of 235 decks +10% synergy
Arid Mesa
11% of 235 decks +1% synergy
Verdant Catacombs
11% of 235 decks -1% synergy
Underground Sea
11% of 235 decks -4% synergy
Marsh Flats
10% of 235 decks -1% synergy