Pentavus
Cauldron of Souls
Clock of Omens
Ashnod's Altar

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield.
Pentavus does not have a -1/-1 counter on it.

   Steps

How does this combo work?
1
Activate Cauldron of Souls by tapping it, giving Pentavus persist until end of turn.
2
Activate Ashnod's Altar by sacrificing Pentavus, adding .
3
When Pentavus dies, its persist ability triggers, returning it from your graveyard to the battlefield with four +1/+1 counters on it.
4
Activate Pentavus' first ability twice by paying 2 and removing two +1/+1 counters from it, creating two 1/1 Pentavite artifact creature tokens.
5
Activate Clock of Omens by tapping Pentavus and a Pentavite, untapping Cauldron of Souls.
6
Repeat.
7
Once you have infinite colorless mana and Pentavite tokens, you may use Pentavus' second ability to put infinite +1/+1 counters on it.

   Results

What do I get from this combo?
Infinite +1/+1 counters on a creature
Infinite colorless mana
Infinite creature tokens
Infinite death triggers
Infinite ETB
Infinite LTB
Infinite mana artifacts you control can produce
Infinite sacrifice triggers
Infinite untap of artifacts you control
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Mana Artifacts
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Worn Powerstone
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Mind Stone
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6%synergy
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17%synergy
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The Mightstone and Weakstone
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Liquimetal Torque
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8%synergy
Lands
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40%synergy
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32%synergy
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26%synergy
Planar Nexus
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21%synergy
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17%synergy
Power Depot
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13%synergy
Hidden Grotto
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13%synergy
Conduit Pylons
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12%synergy
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9%synergy
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9%synergy
Gemstone Caverns
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5%synergy
Evolving Wilds
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-10%synergy
Command Tower
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-64%synergy