Pentavus + Cathars' Crusade + Krark-Clan Ironworks
Pentavus
Cathars' Crusade
Krark-Clan Ironworks
Requires
Pentavus must be on the battlefield.
Cathars' Crusade must be on the battlefield.
Krark-Clan Ironworks must be on the battlefield.
Pentavus has at least two +1/+1 counters on it.
Mana needed: 
Steps
- Activate Pentavus' first ability by paying and removing a +1/+1 counter from it, creating a 1/1 Pentavite creature token.
- The Pentavite enters the battlefield, triggering Cathars' Crusade, putting a +1/+1 counter on each creature you control.
- Activate Krark-Clan Ironworks by sacrificing the Pentavite, adding .
- Repeat.
Results
Infinite +1/+1 counters. Infinite colorless mana. Infinite creature tokens. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers.
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Spectator Seating
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Windswept Heath
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+12% synergy
Exotic Orchard
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Power Depot
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Arid Mesa
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Terramorphic Expanse
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19% of 27 decks
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Flagstones of Trokair
15% of 27 decks
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Opal Palace
15% of 27 decks
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Cavern of Souls
15% of 27 decks
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Marsh Flats
15% of 27 decks
+4% synergy
Verdant Catacombs
15% of 27 decks
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Myriad Landscape
15% of 27 decks
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Path of Ancestry
15% of 27 decks
-6% synergy
Glimmervoid
11% of 27 decks
+11% synergy
Krosan Verge
11% of 27 decks
+8% synergy
Flooded Strand
11% of 27 decks
+1% synergy
Misty Rainforest
11% of 27 decks
-1% synergy