Basri's Lieutenant + Metallic Mimic + Ashnod's Altar

Basri's Lieutenant
Metallic Mimic
Ashnod's Altar

Requires
Basri's Lieutenant must be on the battlefield. Metallic Mimic must be on the battlefield. Ashnod's Altar must be on the battlefield. You control at least one additional creature that has a +1/+1 counter on it. "Knight" chosen with Metallic Mimic.
Steps
  1. Activate Ashnod's Altar by sacrificing another creature with a +1/+1 counter on it, adding .
  2. When the creature dies, Basri's Lieutenant's second ability triggers, creating a 2/2 Knight creature token that enters the battlefield with a +1/+1 counter due to Metallic Mimic.
  3. Repeat.
Results
Infinite colorless mana. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers.

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1.25% of 321 decks 4 decks
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0.12% of 12033 decks 15 decks
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29% of 17 decks +28% synergy
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22% of 18 decks +20% synergy
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22% of 23 decks +19% synergy
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22% of 23 decks +17% synergy
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20% of 20 decks +20% synergy
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19% of 16 decks +18% synergy
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18% of 17 decks +16% synergy
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18% of 17 decks +14% synergy
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17% of 23 decks +13% synergy
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16% of 31 decks +15% synergy
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16% of 25 decks +14% synergy
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29% of 17 decks +22% synergy
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25% of 32 decks +13% synergy
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24% of 17 decks +16% synergy
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24% of 17 decks +15% synergy
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19% of 32 decks +14% synergy
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17% of 23 decks +6% synergy
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Anguished Unmaking
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35% of 17 decks +33% synergy
Damn
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Final Parting
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39% of 23 decks +36% synergy
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39% of 23 decks +33% synergy
Sunken Hollow
38% of 16 decks +29% synergy
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38% of 32 decks +26% synergy
Flooded Strand
34% of 32 decks +24% synergy
Cavern of Souls
31% of 32 decks +25% synergy
Isolated Chapel
30% of 23 decks +24% synergy
Shadowy Backstreet
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Temple of Enlightenment
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Myriad Landscape
28% of 32 decks +8% synergy
Orzhov Basilica
26% of 23 decks +22% synergy
Temple of Silence
26% of 23 decks +22% synergy
Temple of Deceit
25% of 16 decks +21% synergy
Choked Estuary
25% of 16 decks +21% synergy
Polluted Delta
25% of 32 decks +14% synergy
Evolving Wilds
25% of 32 decks +4% synergy
Hengegate Pathway
24% of 17 decks +22% synergy
Clearwater Pathway
19% of 16 decks +16% synergy
Shipwreck Marsh
19% of 16 decks +14% synergy
Terramorphic Expanse
19% of 32 decks +3% synergy
Port Town
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Deserted Beach
18% of 17 decks +14% synergy
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Brightclimb Pathway
17% of 23 decks +15% synergy
City of Brass
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Thriving Moor
13% of 23 decks +12% synergy
Concealed Courtyard
13% of 23 decks +12% synergy
Scrubland
13% of 23 decks +10% synergy
Shattered Sanctum
13% of 23 decks +10% synergy
Demolition Field
13% of 31 decks +10% synergy
Plaza of Heroes
13% of 31 decks +9% synergy
Forbidden Orchard
12% of 32 decks +10% synergy
Secluded Courtyard
12% of 32 decks +8% synergy